[Chore] Ensure that the match labels are consistent

[ctiml]

Signed-off-by: Timothy Lee ctiml@infuseai.io

PR checklist

• [x] Ensure you have added or ran the appropriate tests for your PR.
• [x] DCO signed

What type of PR is this? Chore

What this PR does / why we need it: Ensure that the match labels of postgresql statefulset are consistent