Ensure AzureProvisioningResource Outputs are populated correctly

[eerhardt]

Description

This allows other code to inspect which Outputs a resource has.

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
• Did you add public API?
  • No
• Does the change make any security assumptions or guarantees?
  • No
• Does the change require an update in our Aspire docs?
  • No

[Copilot]

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

tests/Aspire.Hosting.Azure.Tests/AzureProvisioningResourceTests.cs:33

• The test relies on the ordering of dictionary outputs, which may not be guaranteed. Consider using order-independent assertions (e.g. Assert.Contains or comparing collection keys) to verify all expected keys are present.

Assert.Collection(resource1.Resource.Outputs,

[eerhardt]

We might not need this. So making a draft for now, to discuss.