K8SPG-882 determine patroni version without using the special patroni version check pod

[gkech]

CHANGE DESCRIPTION

Problem:

The current patroni version check implementation can be completely skipped. We can assume by default patroni version 4.x. The operator should be able to determine the patroni version by running a patronictl version command to an instance pod, database container and assign this value to the pg status, as well to an annotation pgv2.percona.com/patroni-version. The custom patroni version annotation option will not continue to be support with this version.

For cr 2.7 and older, the pgv2.percona.com/custom-patroni-version should continue to work. The patroni version check pod also should continue working for these cr versions.

Cause:
Short explanation of the root cause of the issue if applicable.

Solution:
Short explanation of the solution we are providing with this PR.

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?

[egegunes]

@gkech please check unit tests

[JNKPercona]

Test Name	Result	Time
backup-enable-disable	passed	00:10:34
custom-envs	passed	00:17:23
custom-extensions	passed	00:14:09
custom-tls	passed	00:05:10
database-init-sql	passed	00:02:20
demand-backup	passed	00:23:19
finalizers	passed	00:03:52
init-deploy	passed	00:03:17
monitoring	passed	00:08:26
monitoring-pmm3	passed	00:10:34
one-pod	passed	00:06:21
operator-self-healing	passed	00:08:35
pgvector-extension	passed	00:03:17
pitr	passed	00:12:31
scaling	passed	00:05:11
scheduled-backup	passed	00:27:14
self-healing	passed	00:09:12
sidecars	passed	00:02:41
start-from-backup	passed	00:12:45
tablespaces	passed	00:07:21
telemetry-transfer	passed	00:03:32
upgrade-consistency	passed	00:12:01
upgrade-minor	passed	00:06:13
users	passed	00:04:46

Summary	Value
Tests Run	24/24
Job Duration	01:24:08
Total Test Time	03:40:53

commit: 898926b
image: perconalab/percona-postgresql-operator:PR-1334-898926bc1