delete selector in config svc

[LeoQuote]

patroni dont need selector https://github.com/zalando/patroni/blob/89d794facc3e1fa728ccfbe6ac0323d668c8e021/kubernetes/patroni_k8s.yaml#L1-L10

What this PR does / why we need it

when creating service with selector, there's a chance that it would block installation

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

Special notes for your reviewer

Checklist

• [x] Chart Version bumped
• [x] CLA signed

[CLAassistant]

All committers have signed the CLA.