refactor(consensus): Rename router_verifier to block_verifier_router

[teor2345]

Motivation

router_verifier sounds like something that verifies routes or routers. But what it actually does it route blocks to other verifiers.

Solution

Do a mass rename to block_verifier_router using these commands:

git ls-tree --full-tree -r --name-only HEAD | xargs sed -i -e 's/router_verifier/block_verifier_router/g'
cargo fmt --all

Review

You can automatically review this code using the review instructions at:
https://github.com/ZcashFoundation/zebra/blob/main/book/src/dev/mass-renames.md#universal-renames-with-sed

Reviewer Checklist

• Are the PR labels correct?
• Does the code do what the ticket and PR says?
  • Does it change concurrent code, unsafe code, or consensus rules?
• How do you know it works? Does it have tests?

[codecov]

Codecov Report

Merging #6998 (a56d8b4) into main (0da2dcb) will decrease coverage by 0.07%.
The diff coverage is 86.48%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6998      +/-   ##
==========================================
- Coverage   77.49%   77.43%   -0.07%     
==========================================
  Files         310      310              
  Lines       41536    41548      +12     
==========================================
- Hits        32189    32173      -16     
- Misses       9347     9375      +28     

[teor2345]

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[mergify]

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