[CI] Use rust-cache@v2 when building on CI

[blyxyas]

Description

We're currently only using cache on the lintcheck.yml workflow. This means that we're downloading and building the same crates a lot. We currently use about 50s on that Build step. About a third of the CI time.

We should use the rust-cache Action for this purpose.

Version

NA

Additional Labels

No response

[BD103]

Can I suggest Leafwing-Studios/cargo-cache for this purpose? It works the same as rust-cache, but also sweeps the target directory to remove stale artifacts that are not used.

Even if that's decided against, I'm still interested in working on this issue as a whole. Just give me a 👍 to get started :)

[blyxyas]

If you think that Leafwing-Studios/cargo-cache would fit better, feel free to use it! ❤

[blyxyas]

Btw, if you open a PR, remember to assign it to me by writing "r? @blyxyas" as the last line of the PR description.

[flip1995]

Please keep me in the loop with CI changes. I'm usually auto-assigned to PRs touching those files, if you don't add an explicit r?.