K8SPG-554: add .spec.tlsOnly field

[pooknull]

https://perconadev.atlassian.net/browse/K8SPG-554

DESCRIPTION

This PR adds a .spec.tlsOnly field that converts all HBA records with host or hostnossl origins to hostssl. This behavior matches the tlsOnly option in Percona Operator for PostgreSQL v1.

Note: the field name is not final and should be discussed

CHECKLIST

Jira

• Is the Jira ticket created and referenced properly?
• Does the Jira ticket have the proper statuses for documentation (Needs Doc) and QA (Needs QA)?
• Does the Jira ticket link to the proper milestone (Fix Version field)?

Tests

• Is an E2E test/test case added for the new feature/change?
• Are unit tests added where appropriate?

Config/Logging/Testability

• Are all needed new/changed options added to default YAML files?
• Are all needed new/changed options added to the Helm Chart?
• Did we add proper logging messages for operator actions?
• Did we ensure compatibility with the previous version or cluster upgrade process?
• Does the change support oldest and newest supported PG version?
• Does the change support oldest and newest supported Kubernetes version?

[hors]

@pooknull did you create helm chart PR?

[pooknull]

@hors percona/percona-helm-charts#469