Backport to branch(3) : Merge ConsensusCommitTestUtils and ConsensusCommitIntegrationTestUtils

[feeblefakie]

This is an automated request for a manual backport of the following:

• Original PR: Merge ConsensusCommitTestUtils and ConsensusCommitIntegrationTestUtils #2733
• Commit to backport: e7c8b7a

1. Resolve any conflicts that occur during the cherry-picking process.

git fetch origin &&
git checkout 3-pull-2733 &&
git cherry-pick --no-rerere-autoupdate -m1 e7c8b7a3b49c857d175cbe449d9024b93ab05e0c

2. Push the changes.
3. Merge this PR after all checks have passed.

Thank you!