fix: Use bytes instead of string comparison in delete validator queue (backport cosmos/cosmos-sdk#12303)

[0Tech]

Description

Cherry-pick of:

• cosmos/cosmos-sdk#12303

Motivation and context

How has this been tested?

Screenshots (if appropriate):

Checklist:

• [x] I followed the contributing guidelines and code of conduct.
• [x] I have added a relevant changelog to CHANGELOG.md
• [ ] I have added tests to cover my changes.
• [ ] I have updated the documentation accordingly.
• [ ] I have updated API documentation client/docs/swagger-ui/swagger.yaml

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:x: williamchong
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[0Tech]

Please ignore CLA.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 50.00000% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 70.43%. Comparing base (a7a39e5) to head (29cc88d).

:exclamation: Current head 29cc88d differs from pull request most recent head b16ba19. Consider uploading reports for the commit b16ba19 to get more accurate results

Additional details and impacted files

[](https://app.codecov.io/gh/Finschia/finschia-sdk/pull/1301?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Finschia) ```diff @@ Coverage Diff @@ ## main #1301 +/- ## ========================================== - Coverage 70.43% 70.43% -0.01% ========================================== Files 643 643 Lines 54724 54726 +2 ========================================== Hits 38544 38544 - Misses 14009 14010 +1 - Partials 2171 2172 +1 ``` | [Files](https://app.codecov.io/gh/Finschia/finschia-sdk/pull/1301?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Finschia) | Coverage Δ | | |---|---|---| | [x/staking/keeper/validator.go](https://app.codecov.io/gh/Finschia/finschia-sdk/pull/1301?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Finschia#diff-eC9zdGFraW5nL2tlZXBlci92YWxpZGF0b3IuZ28=) | `80.95% <50.00%> (-1.27%)` | :arrow_down: | ... and [3 files with indirect coverage changes](https://app.codecov.io/gh/Finschia/finschia-sdk/pull/1301/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Finschia)

[0Tech]

Please ignore coverage on panic scenarios.