Allow Oauth2 and basic auth for management UI and support multiple oauth2 resources

[MarcialRosales]

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Note: This PR should not be merged until the PR https://github.com/rabbitmq/rabbitmq-server/pull/10012 is released

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[michaelklishin]

Hooray! Thanks to everyone involved. This was one of the most extensive doc efforts (not counting the switch to Docusaurus) in a while.