feat: add crates.io as a source for auto version bump

[mbhall88]

Description:

On the gitter for conda-forge someone pointed me at this script as the source for automatic version bumps. The conversation was in relation to allowing crates.io (Rust package repository) to be detected for auto version bumps. Crates can be used to build packages, but there is no auto bump functionality (as far as I can tell).

I hope what I have contributed here is okay? Not sure if I've missed anything as I am new to this codebase.

Checklist:

• Pydantic model updated or no update needed

Cross-refs, links to issues, etc:

[beckermr]

See the comment above.

[mbhall88]

Fixed the failing test and added a full integration test for the new crates.io source

[beckermr]

pre-commit.ci autofix

[mbhall88]

@beckermr does the version bump infrastructure get the sha256 by just downloading the new version tarball and running sha256sum on that downloaded tarball? The reason I ask is that the crates.io API provides the checksum for the tarball which seems like a better place to get it than from the downloaded tarball in case there were issues with the download correct? (I've likely got this all wrong though sorry)

[beckermr]

Yes, the update code does a download and checksum. Unfortunately, we have no way to feed a new checksum into the version bump code for the recipe. Further, not all version update sources supply a checksum. So while you are of course correct, in practice we don't support this.

[codecov]

Codecov Report

Attention: Patch coverage is 95.23810% with 5 lines in your changes missing coverage. Please review.

Project coverage is 76.24%. Comparing base (3312df0) to head (7ca7367).
Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
tests/test_upstream_versions.py	80.95%	4 Missing ⚠️
conda_forge_tick/update_sources.py	96.15%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3008      +/-   ##
==========================================
+ Coverage   76.09%   76.24%   +0.15%     
==========================================
  Files         119      120       +1     
  Lines       12803    12908     +105     
==========================================
+ Hits         9742     9842     +100     
- Misses       3061     3066       +5     

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