Revert images back to main after 2.8.0 release

[eleo007]

CHANGE DESCRIPTION

Problem:
Short explanation of the problem.

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?

[JNKPercona]

Test Name	Result	Time
backup-enable-disable	passed	00:10:23
custom-envs	passed	00:19:21
custom-extensions	passed	00:16:53
custom-tls	passed	00:06:36
database-init-sql	passed	00:02:27
demand-backup	passed	00:25:48
finalizers	passed	00:03:49
init-deploy	passed	00:02:56
monitoring	passed	00:08:32
monitoring-pmm3	passed	00:08:59
one-pod	passed	00:06:02
operator-self-healing	passed	00:08:16
pgvector-extension	passed	00:02:40
pitr	passed	00:11:40
scaling	passed	00:05:14
scheduled-backup	passed	00:29:46
self-healing	passed	00:09:49
sidecars	passed	00:02:34
start-from-backup	passed	00:11:53
tablespaces	passed	00:06:41
telemetry-transfer	passed	00:03:26
upgrade-consistency	passed	00:07:49
upgrade-minor	passed	00:06:24
users	passed	00:04:45

Summary	Value
Tests Run	24/24
Job Duration	01:33:03
Total Test Time	03:42:58

commit: b236b51
image: perconalab/percona-postgresql-operator:PR-1353-b236b5182