fix(checkers): remove log warning of acme redis password

[gruceo]

Summary

redis.password should work and redis.auth is just a shorthand left for backwards compatiblity reasons.

[team-gateway-bot]

Cherry-pick failed for master, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git remote add upstream https://github.com/kong/kong-ee
git fetch upstream master
git worktree add -d .worktree/cherry-pick-13518-to-master-to-upstream upstream/master
cd .worktree/cherry-pick-13518-to-master-to-upstream
git checkout -b cherry-pick-13518-to-master-to-upstream
ancref=$(git merge-base 28c5f6a23f9575b987afec2bd0d4119d9b24b8fb 95495430b6aef356e31356cc09ad31f2efed20a8)
git cherry-pick -x $ancref..95495430b6aef356e31356cc09ad31f2efed20a8