[stable/redis-ha] Switch to standard labels

[chernetskyi]

What this PR does / why we need it:

Update label keys in redis-ha chart to follow common conventions:

• https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/
• https://helm.sh/docs/chart_best_practices/labels/

grafana-agent, for example, already follows those.

Special notes for your reviewer:

Kept the same label order everywhere. Followed Helm's best practices to decide on the new label names:

Before	After
app	app.kubernetes.io/name
heritage	app.kubernetes.io/managed-by
release	app.kubernetes.io/instance
chart	helm.sh/chart
component	app.kubernetes.io/component

Checklist

• DCO signed
• Chart Version bumped
• Title of the PR starts with chart name (e.g. [stable/mychartname])

[DandyDeveloper]

@chernetskyi This is great, but this will break upgrades from users:

level=INFO msg="warning: skipped value for redis-ha.affinity: Not a table."
level=WARN msg="upgrade failed" name=redis error="server-side apply failed for object default/redis-redis-ha-haproxy apps/v1, Kind=Deployment: Deployment.apps \"redis-redis-ha-haproxy\" is invalid: spec.selector: Invalid value: {\"matchLabels\":{\"app.kubernetes.io/component\":\"haproxy\",\"app.kubernetes.io/instance\":\"redis\",\"app.kubernetes.io/name\":\"redis-ha-haproxy\"}}: field is immutable && server-side apply failed for object default/redis-redis-ha-server apps/v1, Kind=StatefulSet: StatefulSet.apps \"redis-redis-ha-server\" is invalid: spec: Forbidden: updates to statefulset spec for fields other than 'replicas', 'ordinals', 'template', 'updateStrategy', 'revisionHistoryLimit', 'persistentVolumeClaimRetentionPolicy' and 'minReadySeconds' are forbidden"
Error: UPGRADE FAILED: server-side apply failed for object default/redis-redis-ha-haproxy apps/v1, Kind=Deployment: Deployment.apps "redis-redis-ha-haproxy" is invalid: spec.selector: Invalid value: {"matchLabels":{"app.kubernetes.io/component":"haproxy","app.kubernetes.io/instance":"redis","app.kubernetes.io/name":"redis-ha-haproxy"}}: field is immutable && server-side apply failed for object default/redis-redis-ha-server apps/v1, Kind=StatefulSet: StatefulSet.apps "redis-redis-ha-server" is invalid: spec: Forbidden: updates to statefulset spec for fields other than 'replicas', 'ordinals', 'template', 'updateStrategy', 'revisionHistoryLimit', 'persistentVolumeClaimRetentionPolicy' and 'minReadySeconds' are forbidden

It's a pretty significant break as people have to delete the STS and recreate which will bring down the clusters.