Skip leader slots until a vote lands (bp #15607)

[mergify]

This is an automatic backport of pull request #15607 done by Mergify.

Cherry-pick of b99ae8f has failed:

On branch mergify/bp/v1.6/pr-15607
Your branch is up to date with 'origin/v1.6'.

You are currently cherry-picking commit b99ae8f33.
  (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/src/test_validator.rs
	modified:   core/src/tvu.rs
	modified:   core/src/validator.rs
	modified:   local-cluster/src/validator_configs.rs
	modified:   multinode-demo/bootstrap-validator.sh
	modified:   run.sh
	modified:   validator/src/main.rs

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

To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

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[mergify]

automerge label removed due to a CI failure

[codecov]

Codecov Report

Merging #16147 (4e26266) into v1.6 (8f852d8) will decrease coverage by 0.0%.
The diff coverage is 72.0%.

@@            Coverage Diff            @@
##             v1.6   #16147     +/-   ##
=========================================
- Coverage    79.9%    79.9%   -0.1%     
=========================================
  Files         409      409             
  Lines      107665   107697     +32     
=========================================
- Hits        86078    86058     -20     
- Misses      21587    21639     +52