Support cargo-udeps

[gifnksm]

cargo-udeps is a tool to find unused dependencies.
It is useful to keep the binary size of the crate no larger than necessary.

To run cargo-udeps on a crate with many combinations of features, it is better to use GitHub Actions.
I want to use this action to easily use cargo-udeps, so I created this pull request.

This action falls back to cargo-binstall by default when trying to install an unknown package, but it did not work well in my environment.

• On macOS, an installation by cargo-binstall failed.
  • macOS CI log (Job is successful because the error was ignored)
• On Linux/Windows, cargo-udeps could not find when cargo directory is restored by a cache
  • Linux CI log
  • Windows CI log

I don't know why this occurred, but with this pull request, the installation succeeded and I was able to use cargo-udeps as expected.

• Linux CI log with this PR
• macOS CI log with this PR
• Windows CI log with this PR

[NobodyXu]

@gifnksm That's strange since we already use create_dir_all to ensure dirs exist before installing.

[NobodyXu]

@gifnksm For ubuntu and win, what happened isna caching problem.

cargo-binstall writes metadata about crates installed to $CARGO_HOME/binstall/crates-v1.json and skip when asked to install again.

[taiki-e]

Thanks!

[taiki-e]

Published in 1.11.0.