Breaking: Drop bundled MinIO chart

Clemens Beckrequested to merge
cb-drop-minio into master

What does this MR do?

Breaking: Drop bundled MinIO chart

  • Drop the bundled MinIO subchart which was included for evaluation and PoC purposes. The deprecation was announced at https://docs.gitlab.com/update/deprecations/#support-for-bundled-postgresql-redis-and-minio-in-gitlab-helm-chart.
  • Removes the obsolete global.minio.enabled guard from object storage config validation
  • Adds checkConfig validation that blocks chart rendering no external object storate is configured (for Rails, backup/restore, and Registry)
  • Removes the now-obsolete MinIO deprecation removal notices from _removals.tpl
  • Updates documentation throughout that MinIO is no longer bundled and link to external object storage guides
  • Cleanup some leftovers from the PostgreSQL/Redis removal.

Relates Remove bundled PostgreSQL, Redis, MinIO (#6281 - closed)

Changelog: removed

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Edited by Clemens Beck

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