Mark Aspire.Azure.Messaging.EventHubs as stable

[eerhardt]

Description

The EventHubs client library has been in preview for a few versions. We are marking it as stable so customers can use it with confidence.

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
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • 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

[eerhardt]

/backport to release/8.2

[github-actions]

Started backporting to release/8.2: https://github.com/dotnet/aspire/actions/runs/10567359457