Remove TransitName and code used only by it

[mwachs5]

Contributor Checklist

• [N/A] Did you add Scaladoc to every public function/method?
• Did you add at least one test demonstrating the PR?
• Did you delete any extraneous printlns/debugging code?
• Did you specify the type of improvement?
• [N/A] Did you add appropriate documentation in docs/src?
• Did you state the API impact?
• Did you specify the code generation impact?
• Did you request a desired merge strategy?
• Did you add text to be included in the Release Notes for this change?

Type of Improvement

• code cleanup

API Impact

This removes the TransitName api deprecated in #2603. Should be merged after that one.
It also uses the naming plugin aPIs to get "good" names in the two usages of the TransitName API. It also "garbage collects" the hook related code that was only there for usage by TransitName.

Backend Code Generation Impact

This will change the generated verilog for Queue.apply() and Pipe.apply, the only usages of TransitName in the codebase. I added unit tests that the names are still "good" and in fact much better than they were before IMHO.

For example you can see the before (07495d5#diff-8dd923d131a5cad79defd56265f33df9037ac4e5169a46f4933f5a66935a7637R150 and after:08cd4c2 for Pipe:

Desired Merge Strategy

• Squash: The PR will be squashed and merged (choose this if you have no preference.

Release Notes

Remove TransitName API and code only used by it.

Reviewer Checklist (only modified by reviewer)

• Did you add the appropriate labels?
• Did you mark the proper milestone (Bug fix: 3.4.x, [small] API extension: 3.5.x, API modification or big change: 3.6.0)?
• Did you review?
• Did you check whether all relevant Contributor checkboxes have been checked?
• Did you do one of the following when ready to merge:
  • Squash: You/ the contributor Enable auto-merge (squash), clean up the commit message, and label with Please Merge.
  • Merge: Ensure that contributor has cleaned up their commit history, then merge with Create a merge commit.

[seldridge]

I'm super happy to see this gone! 💯