fix: logger on Windows

[bzp2010]

Please answer these questions before submitting a pull request, or your PR will get closed.

Why submit this pull request?

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What changes will this PR take into?

The following errors will appear when the current Manager API is running on windows.

panic: couldn't open sink "C:\\apisix-dashboard\\api\\logs\\error.log": no sink found for scheme "c"

uber-go/zap can't directly handle the windows path starting with, for example, C:\. This PR adds a new scheme processor, which supports accessing log files on Windows system by using winfile:///C:\. At the same time, the program will automatically add winfile when generating the absolute path on Windows.

Checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

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[codecov-commenter]

Codecov Report

Merging #1947 (ce45ba9) into master (e3debe5) will decrease coverage by 2.96%.
The diff coverage is n/a.

❗ Current head ce45ba9 differs from pull request most recent head d947510. Consider uploading reports for the commit d947510 to get more accurate results

@@            Coverage Diff             @@
##           master    #1947      +/-   ##
==========================================
- Coverage   66.91%   63.95%   -2.97%     
==========================================
  Files         179      122      -57     
  Lines        6537     3154    -3383     
  Branches      753      753              
==========================================
- Hits         4374     2017    -2357     
+ Misses       1897     1137     -760     
+ Partials      266        0     -266     

Flag	Coverage Δ
backend-e2e-test	?
backend-e2e-test-ginkgo	?
backend-unit-test	?
frontend-e2e-test	63.95% <ø> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
web/src/helpers.tsx	68.85% <0.00%> (-3.28%)	⬇️
api/cmd/stop.go
api/internal/core/storage/storage_mock.go
api/cmd/version.go
api/internal/route.go
api/internal/core/storage/etcd.go
api/internal/core/store/validate_mock.go
api/internal/handler/upstream/upstream.go
api/internal/filter/authentication.go
api/internal/handler/healthz/healthz.go
... and 45 more

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[nic-chen]

Please test manually to confirm that there is no problem, since CI does not support Windows currently.

[bzp2010]

@nic-chen

Please test manually to confirm that there is no problem, since CI does not support Windows currently.

I found that when I remove the code in conf.go to get the absolute path of the file, I can directly use the relative path to write the log on windows.

Update1 When I did, I couldn't pass CI's linux test. I will adopt the original plan for the time being. This will produce some redundant code. At the same time, I will refactor the configuration module in another PR (#1946) to solve these problems.