K8SPG-552 cert manager integration

[gkech]

CHANGE DESCRIPTION

Problem:

In terms of certificates, right now the operator creates them through its own internal logic. Utilizing however the cert-manager and integrating it with the operator, it allows the operator to configure the issuers and the certificates and then the cert-manager will manage their lifecycle.

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?

[github-actions]

[goimports-reviser] _{reported by reviewdog 🐶}

Suggested change

certmanagerscheme "github.com/cert-manager/cert-manager/pkg/client/clientset/versioned/scheme"

[JNKPercona]

Test Name	Result	Time
backup-enable-disable	passed	00:07:30
builtin-extensions	passed	00:05:14
cert-manager-tls	failure	00:08:24
custom-envs	passed	00:18:32
custom-extensions	passed	00:13:41
custom-tls	failure	00:09:37
database-init-sql	passed	00:02:08
demand-backup	failure	00:18:41
finalizers	passed	00:03:40
init-deploy	passed	00:02:46
huge-pages	passed	00:02:47
monitoring	failure	00:09:08
monitoring-pmm3	passed	00:07:52
one-pod	passed	00:05:39
operator-self-healing	passed	00:08:16
pitr	passed	00:12:04
scaling	passed	00:04:56
scheduled-backup	failure	00:17:35
self-healing	passed	00:08:49
sidecars	passed	00:02:47
standby-pgbackrest	passed	00:11:53
standby-streaming	passed	00:09:09
start-from-backup	failure	00:09:26
tablespaces	passed	00:06:50
telemetry-transfer	passed	00:03:23
upgrade-consistency	passed	00:06:21
upgrade-minor	passed	00:05:09
users	passed	00:04:29

Summary	Value
Tests Run	28/28
Job Duration	01:49:13
Total Test Time	03:46:59

commit: 924dcbc
image: perconalab/percona-postgresql-operator:PR-1233-924dcbc40