K8SPXC-1668: proxysql3 support

[pooknull]

https://perconadev.atlassian.net/browse/K8SPXC-1668

DESCRIPTION

This PR updates the default IMAGE_PROXY to percona/proxysql3:3.0 and applies minor test fixes to verify that the operator supports proxysql v3

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?
• Are OpenShift compare files changed for E2E tests (compare/*-oc.yml)?

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 PXC version?
• Does the change support oldest and newest supported Kubernetes version?

[eleo007]

But why with proxysql 3 all the nodes are now added to writer group? It should contain only pxc pod 0

[hors]

@egegunes ^

[egegunes]

yes, this is wrong.

[hors]

We have a blicker https://perconadev.atlassian.net/browse/PSQLADM-581

[JNKPercona]

Test Name	Result	Time
auto-tuning-8-0	passed	00:19:21
allocator-8-0	passed	00:12:32
backup-storage-tls-8-0	passed	00:22:07
cross-site-8-0	passed	00:34:57
custom-users-8-0	passed	00:12:46
demand-backup-cloud-8-0	passed	00:57:45
demand-backup-encrypted-with-tls-8-0	passed	00:46:12
demand-backup-8-0	passed	00:41:53
demand-backup-flow-control-8-0	passed	00:11:03
demand-backup-parallel-8-0	passed	00:08:54
demand-backup-without-passwords-8-0	passed	00:15:06
haproxy-5-7	passed	00:14:53
haproxy-8-0	passed	00:15:01
init-deploy-5-7	passed	00:16:33
init-deploy-8-0	passed	00:17:03
limits-8-0	passed	00:12:19
monitoring-2-0-8-0	passed	00:23:14
monitoring-pmm3-8-0	passed	00:17:53
one-pod-5-7	passed	00:14:12
one-pod-8-0	passed	00:13:44
pitr-8-0	passed	00:43:28
pitr-gap-errors-8-0	passed	00:56:00
proxy-protocol-8-0	passed	00:09:21
proxy-switch-8-0	failure	01:30:05
proxysql-sidecar-res-limits-8-0	passed	00:08:45
proxysql-scheduler-8-0	failure	00:09:24
pvc-resize-5-7	passed	00:18:23
pvc-resize-8-0	passed	00:15:53
recreate-8-0	passed	00:17:19
restore-to-encrypted-cluster-8-0	passed	00:25:10
scaling-proxysql-8-0	passed	00:08:40
scaling-8-0	passed	00:11:23
scheduled-backup-5-7	passed	01:05:59
scheduled-backup-8-0	passed	01:03:54
security-context-8-0	passed	00:25:23
smart-update1-8-0	passed	00:32:19
smart-update2-8-0	passed	00:38:25
storage-8-0	passed	00:10:35
tls-issue-cert-manager-ref-8-0	passed	00:08:43
tls-issue-cert-manager-8-0	passed	00:09:46
tls-issue-self-8-0	passed	00:13:29
upgrade-consistency-8-0	passed	00:10:59
upgrade-haproxy-5-7	passed	00:24:40
upgrade-haproxy-8-0	passed	00:24:57
upgrade-proxysql-5-7	passed	00:14:07
upgrade-proxysql-8-0	passed	00:14:27
users-5-7	failure	00:10:05
users-8-0	passed	00:24:36
validation-hook-8-0	passed	00:01:58

Summary	Value
Tests Run	49/49
Job Duration	04:08:44
Total Test Time	18:56:04

commit: 30ece6d
image: perconalab/percona-xtradb-cluster-operator:PR-2265-30ece6d6