refactor(consensus): print err from SignAndCheckVote (backport #2346)

[mergify]

This is an automatic backport of pull request #2346 done by Mergify.
Cherry-pick of e623c44 has failed:

On branch mergify/bp/v0.38.x/pr-2346
Your branch is up to date with 'origin/v0.38.x'.

You are currently cherry-picking commit e623c4406.
  (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:   consensus/state.go
	modified:   types/vote.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   types/vote_test.go

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

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