K8SPG-792 Make patroni check check respect default image settings

[Kajot-dev]

CHANGE DESCRIPTION

Problem:
See #1148

Cause:
Makes pod with patroni version check respect default image if there is any

Solution:
Wrapped around builtin PGO function from upstream. Would be a problem importing pkg/apis/pgv2.percona.com/v2/perconapgcluster_types.go into PGO config module due to dependency cycle.

fixes: #1148

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?

[it-percona-cla]

All committers have signed the CLA.

[gkech]

We can introduce a very basic unit test to verify in a consistent way the functionality in future iterations.

[Kajot-dev]

Added unit tests for the default image behaviour

[JNKPercona]

Test Name	Result	Time
backup-enable-disable	passed	00:00:00
custom-extensions	passed	00:00:00
custom-tls	passed	00:00:00
demand-backup	passed	00:00:00
finalizers	passed	00:04:30
init-deploy	passed	00:00:00
monitoring	passed	00:00:00
monitoring-pmm3	passed	00:00:00
one-pod	passed	00:00:00
operator-self-healing	passed	00:00:00
pitr	passed	00:00:00
scaling	passed	00:05:47
scheduled-backup	passed	00:00:00
self-healing	passed	00:00:00
sidecars	passed	00:00:00
start-from-backup	passed	00:00:00
tablespaces	passed	00:00:00
telemetry-transfer	passed	00:00:00
upgrade-consistency	passed	00:00:00
upgrade-minor	passed	00:00:00
users	passed	00:00:00
We run 21 out of 21		00:10:17

commit: ad5c5a4
image: perconalab/percona-postgresql-operator:PR-1167-ad5c5a430

[hors]

@Kajot-dev thank you for your contribution. We will include this fix in PGO 2.7.0.