Replaced crates_universe rule with crates_repository

[UebelAndre]

This PR replaces the existing crate_universe rules and binaries with https://github.com/abrisco/cargo-bazel which is an equivalent tool that generally solves for the same desires and is more self-contained.

[UebelAndre]

@illicitonion would likely be the best reviewer since, to my knowledge, they're avid consumers of crates_universe.

I tried to refactor this PR into small sections to make this easier to review. Each commit should be reviewed individually and anything that refers to "Updating lockfiles" is a commit containing generated content and is probably not worth digging into after confirming the code changes are in a good state.

[illicitonion]

LGTM!

[shikhar]

Curious, what is the relationship between crates_universe and cargo-bazel? I see similar APIs, so looks like there is some shared history?

[illicitonion]

Curious, what is the relationship between crates_universe and cargo-bazel? I see similar APIs, so looks like there is some shared history?

My team and I put together crates_universe as an experimental prototype, and after a few folks including @UebelAndre started using it, @UebelAndre was inspired to rewrite it in a much cleaner way. They have some shared history, but cargo-bazel is a much more principled, well-thought-out implementation, learning from the lessons we learnt in crates_universe, rather than trying to do whatever expedient things we could in the original prototype to get something working fast :)