Docs: Choosing what catalog ClusterExtensions come from

[bentito]

Users need to understand setting the preferred ClusterCatalog name to get a ClusterExtension from.

They also need to understand setting priorities to break ties when package/bundle/version are available in multiple catalogs.
RFCS:

• Minimal Catalog Selection - Labels
• Minimal Catalog Selection - Priority

[dhoover103]

/assign

[dhoover103]

Doc is ready for review - you can find it at https://docs.google.com/document/d/1wxmEbaDCWUqCSkeYnAP6uFTOGubvhUx6cT0gsihwE1g/edit?usp=sharing

[bentito]

So sorry @dhoover103 we somehow created #1154 for the docs for this epic. I didn't catch that this issue already existed. I see your gDoc here. Could you merge improvements/changes from that into the doc PR here: #1227 . Thanks so much!

[LalatenduMohanty]

This a duplicate of #1154