K8SPXC-1378: add labels to every resource

[pooknull]

https://perconadev.atlassian.net/browse/K8SPXC-1378

DESCRIPTION

This PR adds new labels to all resources created by the operator. All changes are listed in the table below

Table of label changes

Name	apiVersion	kind	Field	Changes
<cluster-name>-pxc <cluster-name>-haproxy <cluster-name>-proxysql	apps/v1	StatefulSet	.spec.volumeClaimTemplates[].metadata.labels	+ app.kubernetes.io/component: <component-name> + app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster
<cluster-name>-pxc <cluster-name>-pxc-unready <cluster-name>-haproxy <cluster-name>-haproxy-replicas <cluster-name>-proxysql <cluster-name>-proxysql-unready	v1	Service	.spec.selector	+ app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/part-of: percona-xtradb-cluster
xb-<pxc-backup-name>	batch/v1	Job	.metadata.labels .spec.selector.matchLabels .spec.template.metadata.labels	- backup-name: <backup-name> - cluster: <cluster-name> - job-name: xb-<backup-name> - type: xtrabackup + app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster + percona.com/backup-job-name: xb-<backup-name> + percona.com/backup-name: <backup-name> + percona.com/backup-type: xtrabackup + percona.com/cluster: <cluster-name>
restore-job-<pxc-restore-name>-<cluster-name>	batch/v1	Job	.metadata.labels .spec.template.metadata.labels	+ app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster + percona.com/restore-job-name: restore-job-<pxc-restore-name>-<cluster-name>
restore-src-<pxc-restore-name>-<cluster-name>	v1	Pod	.metadata.labels	- name: restore-src-<pxc-restore-name>-<cluster-name> + app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster + percona.com/restore-svc-name: <pxc-restore-name>-<cluster-name>
<cluster-name>-pxc <cluster-name>-haproxy <cluster-name>-proxysql	policy/v1	PodDisruptionBudget	.metadata.labels	+ app.kubernetes.io/component: <component-name> + app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster
<cluster-name>-ssl <cluster-name>-ssl-internal	cert-manager.io/v1	Certificate	.metadata.labels	+ app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster
<cluster-name>-pxc-issuer <cluster-name>-pxc-ca-issuer	cert-manager.io/v1	Issuer	.metadata.labels	+ app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster
<cluster-name>-pxc <cluster-name>-proxysql <cluster-name>-haproxy <cluster-name>-logcollector	v1	ConfigMap	.metadata.labels	+ app.kubernetes.io/instance: <cluster-name> + app.kubernetes.io/managed-by: percona-xtradb-cluster-operator + app.kubernetes.io/name: percona-xtradb-cluster + app.kubernetes.io/part-of: percona-xtradb-cluster

Important notes:

• Labels will not be changed for StatefulSets created with crVersion: 1.15.0 or below, because it's not allowed to update .spec.volumeClaimTemplates for StatefulSets
• Previously restore job used labels from .spec.pxc.labels. In this PR operator adds default labels and uses labels from .spec.backup.storages[].labels instead

This PR also resolves K8SPXC-1230

CHECKLIST

Jira

• [x] Is the Jira ticket created and referenced properly?
• [x] Does the Jira ticket have the proper statuses for documentation (Needs Doc) and QA (Needs QA)?
• [x] Does the Jira ticket link to the proper milestone (Fix Version field)?

Tests

• [x] Is an E2E test/test case added for the new feature/change?
• [ ] Are unit tests added where appropriate?
• [x] Are OpenShift compare files changed for E2E tests (compare/*-oc.yml)?

Config/Logging/Testability

• [x] Are all needed new/changed options added to default YAML files?
• [x] Are all needed new/changed options added to the Helm Chart?
• [x] Did we add proper logging messages for operator actions?
• [x] Did we ensure compatibility with the previous version or cluster upgrade process?
• [x] Does the change support oldest and newest supported PXC version?
• [x] Does the change support oldest and newest supported Kubernetes version?

[JNKPercona]

Test name	Status
affinity-8-0	passed
auto-tuning-8-0	passed
cross-site-8-0	passed
demand-backup-cloud-8-0	passed
demand-backup-encrypted-with-tls-8-0	passed
demand-backup-8-0	passed
haproxy-5-7	passed
haproxy-8-0	passed
init-deploy-5-7	passed
init-deploy-8-0	passed
limits-8-0	passed
monitoring-2-0-8-0	passed
one-pod-5-7	passed
one-pod-8-0	passed
pitr-8-0	passed
pitr-gap-errors-8-0	passed
proxy-protocol-8-0	passed
proxysql-sidecar-res-limits-8-0	passed
pvc-resize-5-7	passed
pvc-resize-8-0	passed
recreate-8-0	passed
restore-to-encrypted-cluster-8-0	passed
scaling-proxysql-8-0	passed
scaling-8-0	passed
scheduled-backup-5-7	passed
scheduled-backup-8-0	passed
security-context-8-0	passed
smart-update1-8-0	passed
smart-update2-8-0	passed
storage-8-0	passed
tls-issue-cert-manager-ref-8-0	passed
tls-issue-cert-manager-8-0	passed
tls-issue-self-8-0	passed
upgrade-consistency-8-0	passed
upgrade-haproxy-5-7	passed
upgrade-haproxy-8-0	passed
upgrade-proxysql-5-7	passed
upgrade-proxysql-8-0	passed
users-5-7	passed
users-8-0	passed
validation-hook-8-0	passed
We run 41 out of 41

commit: https://github.com/percona/percona-xtradb-cluster-operator/pull/1823/commits/f7282fc34c6b8f769d9ed0b2a8894e8e41664976 image: perconalab/percona-xtradb-cluster-operator:PR-1823-f7282fc3