Delete streaming destinations from new API

What does this MR do and why?

This is the second of a series of MRs that will point the frontend of audit events streaming destinations to the new API.

In this MR we delete streaming destinations. The work is under use_consolidated_audit_event_stream_dest_api FF.

MR Cadence:

MR	Description
!183848 (merged)	Retrieve streaming destinations from new API
!185411 (merged)	👈 you're here
!186450 (merged) (refactoring)	Rename stream destination editor vue component
!186456 (merged) (refactoring)	Add refactored stream destination editor vue component
!186457 (merged)	Add ability to create new stream destinations
!186647 (merged)	Add ability to update stream destinations

References

• Epic: &12339
• Implementation issues: #442447 (closed) / #524939 (closed)
• FF Rollout issue: #523880 (closed)
• FF Cleanup issue: #523881

Screenshots or screen recordings

Deleting group streaming destinations	Deleting instance streaming destinations
deleting-group-streaming-destinations	deleting-instance-streaming-destinations

How to set up and validate locally

1. Navigate to https://gdk.test:3443/rails/features/ and turn on use_consolidated_audit_event_stream_dest_api
2. Refer to these steps to create new destinations
3. Navigate to the proper view:
   1. Instance: Your Group > Secure > Audit Events > Streams tab
   2. Group: Admin area > Monitoring > Audit Events > Streams tab
4. Expand one of the destinations
5. Click delete
6. Refresh the page to make sure it's deleted.

MR acceptance checklist

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