WaitAnnotation and ResourceNotificationService.WaitForDependenciesAsync

[mitchdenny]

Description

This PR introduces some changes related to WaitFor. Here is the high-level summary:

1. WaitFor and WaitForCompletion add a new annotation to the resource which captures whether to wait for completion or just until healthy.
2. When the DAB creates the app host it wires up to the BeforeResourceStartedEvent which calls out to RNS to wait for the resource dependencies.

Fixes #5557 #5558

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No (existing test coverage is adequate)
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • [x No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • Yes
    • Link to aspire-docs issue:
  • No

Microsoft Reviewers: Open in CodeFlow

[mitchdenny]

/cc @afscrome

[afscrome]

Awesome

[davidfowl]

This is a good change.