chore(IDX): rename test_utils bazel targets to their unique crate names

[basvandijk]

There are many bazel targets named test_utils. This has the problem that when looking at critical path statistics like:

it's hard to know which test_utils target is being referenced making it harder to know which crate to optimise.

Note that this information is coming from Bazel's Event Protocol.

The crates targeted by these test_utils targets do have unique names. I therefor propose to rename the test_utils targets to the crates they target.

I propose the same for other targets like utils and common.

[gregorydemay]

Cross-chain changes LGTM!