Use VecDeque instead of Vec in sigverify stage (backport #22538)

[mergify]

This is an automatic backport of pull request #22538 done by Mergify.
Cherry-pick of 4944340 has failed:

On branch mergify/bp/v1.8/pr-22538
Your branch is up to date with 'origin/v1.8'.

You are currently cherry-picking commit 49443406f.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   core/benches/sigverify_stage.rs

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   core/src/sigverify_stage.rs

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[solana-grimes]

😱 New commits were pushed while the automerge label was present.

[mergify]

automerge label removed due to a CI failure

[codecov]

Codecov Report

Merging #22549 (75fd9dd) into v1.8 (d52dd97) will decrease coverage by 0.0%.
The diff coverage is 100.0%.

@@            Coverage Diff            @@
##             v1.8   #22549     +/-   ##
=========================================
- Coverage    81.6%    81.6%   -0.1%     
=========================================
  Files         459      459             
  Lines      131253   131253             
=========================================
- Hits       107142   107132     -10     
- Misses      24111    24121     +10     

[github-actions]

This PR has been automatically locked since there has not been any activity in past 14 days after it was merged.