feat: Support sharing cache between windows and linux

[Jason3S]

fixes: #5246

• Defaults to the universal format instead of legacy.
• Path separators are converted to / before being stored.

[github-actions]

Performance Report

Rep	Elapsed	Delta	Min	Max	Median	Avg	Count
AdaDoom3/AdaDoom3	11.703	1.93%	11.755	12.028	11.933	11.904	7
alexiosc/megistos	31.038	0.37%	30.436	32.779	31.154	31.145	7
apollographql/apollo-server	6.793	-0.73%	6.431	6.911	6.744	6.694	8
aspnetboilerplate/aspnetboilerplate	23.610	-3.27%	22.662	23.268	22.862	22.932	7
aws-amplify/docs	33.349	-6.35%	30.759	33.636	31.357	31.906	7
Azure/azure-rest-api-specs	28.430	1.77%	27.635	30.838	28.942	29.054	7
bitjson/typescript-starter	0.755	-0.19%	0.729	0.780	0.753	0.754	7
caddyserver/caddy	10.063	0.64%	10.047	10.585	10.128	10.214	7
canada-ca/open-source-logiciel-libre	0.885	0.27%	0.860	0.975	0.887	0.894	7
chef/chef	20.477	0.18%	20.254	21.738	20.513	20.719	7
django/django	51.079	1.88%	49.551	53.176	52.059	51.775	7
eslint/eslint	30.457	2.43%	30.421	37.111	31.215	32.070	7
exonum/exonum	11.655	-0.78%	11.325	12.098	11.565	11.611	7
gitbucket/gitbucket	6.813	2.74%	6.685	7.327	7.005	6.971	7
googleapis/google-cloud-cpp	363.681	1.31%	351.866	395.651	368.500	371.165	8
graphql/express-graphql	0.841	-2.12%	0.790	0.861	0.824	0.823	8
graphql/graphql-js	5.731	3.12%	5.715	6.074	5.916	5.912	8
graphql/graphql-relay-js	0.855	-7.57%	0.760	0.824	0.794	0.795	8
graphql/graphql-spec	1.814	-0.23%	1.764	1.848	1.810	1.810	8
iluwatar/java-design-patterns	29.994	-3.02%	28.115	31.184	29.114	29.206	7
ktaranov/sqlserver-kit	23.379	0.11%	22.906	23.861	23.403	23.396	7
liriliri/licia	8.158	-0.69%	7.733	8.438	8.102	8.146	7
MartinThoma/LaTeX-examples	13.704	-0.45%	13.406	13.886	13.643	13.673	7
mdx-js/mdx	3.765	-1.50%	3.681	3.911	3.709	3.759	7
microsoft/TypeScript-Website	18.436	-4.01%	16.919	18.571	17.725	17.790	7
MicrosoftDocs/PowerShell-Docs	104.616	0.45%	99.342	112.225	105.084	105.259	8
neovim/nvim-lspconfig	8.067	3.91%	8.194	8.626	8.395	8.406	7
pagekit/pagekit	7.381	0.18%	7.137	7.540	7.394	7.380	7
php/php-src	113.655	-3.72%	107.526	119.574	109.577	110.600	8
plasticrake/tplink-smarthome-api	1.458	1.66%	1.438	1.514	1.483	1.481	7
prettier/prettier	13.087	-0.67%	12.700	13.471	12.999	13.055	7
pycontribs/jira	2.410	1.94%	2.392	2.500	2.458	2.446	7
RustPython/RustPython	13.596	-2.51%	13.169	13.536	13.264	13.338	7
shoelace-style/shoelace	7.510	-2.81%	7.101	8.161	7.304	7.425	7
SoftwareBrothers/admin-bro	4.423	-11.59%	3.852	4.216	3.963	3.996	7
sveltejs/svelte	34.456	0.60%	33.886	35.774	34.662	34.810	8
TheAlgorithms/Python	17.077	-4.09%	15.934	16.704	16.405	16.314	7
twbs/bootstrap	3.561	1.97%	3.609	3.947	3.633	3.695	7
typescript-cheatsheets/react	2.141	-4.86%	2.031	2.135	2.042	2.065	7
typescript-eslint/typescript-eslint	8.001	-2.26%	7.660	8.099	7.825	7.856	7
w3c/aria-practices	10.215	-7.28%	9.400	10.023	9.522	9.639	7
w3c/specberus	2.812	1.68%	2.725	2.978	2.860	2.853	8
webdeveric/webpack-assets-manifest	0.733	-2.94%	0.676	0.734	0.712	0.710	7
webpack/webpack	11.928	1.16%	11.793	12.345	12.068	12.103	7
wireapp/wire-desktop	1.203	0.02%	1.197	1.239	1.204	1.214	7
wireapp/wire-webapp	20.587	2.83%	20.400	22.736	21.186	21.308	8

Note: the stats do not include the last value.

Latest Performance by Repo
Repo                           ┃                                           ┃ Rel Val ┃   Min ┃   Max
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━━━━━╋━━━━━━━╋━━━━━━
AdaDoom3/AdaDoom3              ┃                   ●━━┫                    ┃   0.981 ┃ 0.985 ┃ 1.008
alexiosc/megistos              ┃                   ┣━●━━━━┫                ┃   0.996 ┃ 0.977 ┃ 1.052
apollographql/apollo-server    ┃                ┣━━━━━●━┫                  ┃   1.007 ┃ 0.954 ┃ 1.025
aspnetboilerplate/aspnetboiler ┃                    ┣━━┫●                  ┃   1.033 ┃ 0.991 ┃ 1.018
aws-amplify/docs               ┃                   ┣━━━━━━━●┫              ┃   1.064 ┃ 0.981 ┃ 1.073
Azure/azure-rest-api-specs     ┃                ┣━━●━━━━━━━━┫              ┃   0.982 ┃ 0.955 ┃ 1.066
bitjson/typescript-starter     ┃                  ┣━━●━━━┫                 ┃   1.002 ┃ 0.968 ┃ 1.035
caddyserver/caddy              ┃                    ●━━━━━┫                ┃   0.994 ┃ 0.992 ┃ 1.045
canada-ca/open-source-logiciel ┃                  ┣━━●━━━━━━━━━┫           ┃   0.997 ┃ 0.969 ┃ 1.099
chef/chef                      ┃                    ┣●━━━━━┫               ┃   0.998 ┃ 0.987 ┃ 1.060
django/django                  ┃                ┣━━●━━━┫                   ┃   0.981 ┃ 0.952 ┃ 1.021
eslint/eslint                  ┃                  ┣●━━━━━━━━━━━━━━━━━━━━┫  ┃   0.976 ┃ 0.975 ┃ 1.189
exonum/exonum                  ┃                   ┣━━●━━━┫                ┃   1.008 ┃ 0.979 ┃ 1.046
gitbucket/gitbucket            ┃                ┣━●━━━━━━━┫                ┃   0.973 ┃ 0.954 ┃ 1.046
googleapis/google-cloud-cpp    ┃                ┣━━━●━━━━━━━┫              ┃   0.987 ┃ 0.955 ┃ 1.074
graphql/express-graphql        ┃                 ┣━━━━━●━━┫                ┃   1.021 ┃ 0.959 ┃ 1.045
graphql/graphql-js             ┃                  ●━━━━━┫                  ┃   0.969 ┃ 0.966 ┃ 1.027
graphql/graphql-relay-js       ┃                 ┣━━━━━━━┫   ●             ┃   1.076 ┃ 0.956 ┃ 1.037
graphql/graphql-spec           ┃                  ┣━━●━┫                   ┃   1.002 ┃ 0.974 ┃ 1.021
iluwatar/java-design-patterns  ┃                  ┣━━━━━●━━━┫              ┃   1.030 ┃ 0.966 ┃ 1.071
ktaranov/sqlserver-kit         ┃                   ┣━●━┫                   ┃   0.999 ┃ 0.979 ┃ 1.020
liriliri/licia                 ┃                ┣━━━━━●━━┫                 ┃   1.007 ┃ 0.954 ┃ 1.041
MartinThoma/LaTeX-examples     ┃                   ┣━●━┫                   ┃   1.004 ┃ 0.983 ┃ 1.018
mdx-js/mdx                     ┃                    ┣━━●━━┫                ┃   1.015 ┃ 0.993 ┃ 1.054
microsoft/TypeScript-Website   ┃                ┣━━━━━━━━●┫                ┃   1.040 ┃ 0.955 ┃ 1.048
MicrosoftDocs/PowerShell-Docs  ┃               ┣━━━━━●━━━━━━┫              ┃   0.996 ┃ 0.945 ┃ 1.068
neovim/nvim-lspconfig          ┃                 ● ┣━━━━┫                  ┃   0.961 ┃ 0.976 ┃ 1.027
pagekit/pagekit                ┃                 ┣━━━●━┫                   ┃   0.998 ┃ 0.965 ┃ 1.020
php/php-src                    ┃                   ┣━━━━━●━━━━┫            ┃   1.037 ┃ 0.981 ┃ 1.091
plasticrake/tplink-smarthome-a ┃                  ┣●━━━┫                   ┃   0.983 ┃ 0.970 ┃ 1.021
prettier/prettier              ┃                   ┣━━●━━┫                 ┃   1.007 ┃ 0.977 ┃ 1.036
pycontribs/jira                ┃                  ┣●━━━┫                   ┃   0.981 ┃ 0.973 ┃ 1.017
RustPython/RustPython          ┃                    ┣━━┫●                  ┃   1.025 ┃ 0.993 ┃ 1.021
shoelace-style/shoelace        ┃                  ┣━━━━━●━━━━━━━━┫         ┃   1.028 ┃ 0.972 ┃ 1.117
SoftwareBrothers/admin-bro     ┃                  ┣━━━━━━━━┫     ●         ┃   1.116 ┃ 0.972 ┃ 1.064
sveltejs/svelte                ┃                   ┣●━━━┫                  ┃   0.994 ┃ 0.978 ┃ 1.032
TheAlgorithms/Python           ┃                  ┣━━━━┫ ●                 ┃   1.041 ┃ 0.971 ┃ 1.018
twbs/bootstrap                 ┃                   ●┣━━━━━━━━━┫            ┃   0.980 ┃ 0.993 ┃ 1.086
typescript-cheatsheets/react   ┃                    ┣━━━━━●                ┃   1.049 ┃ 0.995 ┃ 1.046
typescript-eslint/typescript-e ┃                   ┣━━━●━┫                 ┃   1.023 ┃ 0.979 ┃ 1.035
w3c/aria-practices             ┃                    ┣━━━━━┫ ●              ┃   1.073 ┃ 0.987 ┃ 1.053
w3c/specberus                  ┃                ┣━━●━━━━━┫                 ┃   0.983 ┃ 0.953 ┃ 1.041
webdeveric/webpack-assets-mani ┃                ┣━━━━━━━●                  ┃   1.029 ┃ 0.950 ┃ 1.032
webpack/webpack                ┃                   ┣●━━┫                   ┃   0.988 ┃ 0.977 ┃ 1.023
wireapp/wire-desktop           ┃                    ┣●━━┫                  ┃   1.000 ┃ 0.994 ┃ 1.029
wireapp/wire-webapp            ┃                 ┣●━━━━━━━━━┫              ┃   0.972 ┃ 0.963 ┃ 1.073