Fix up API examples for armstrong compatibility

[cadenmarchese]

Which issue this PR addresses:

Unblocks ARO-16992

What this PR does / why we need it:

• In order to get Terraform support for the new stable API, we need to test the API swagger and examples with a tool called armstrong, which requires the examples to be formatted in a certain way. In the case of the identity structure, the UserAssignedIdentities key is expected to match a resource ID format because it will always be a resource ID.
• Both this way and the way before should technically both be valid examples, but thought I'd raise the PR in case anyone runs into this in the future. I don't think there's a need to update the current API version's PR upstream with these changes, since those are already approved and the examples are still valid per the swagger.

Test plan for issue:

• N/A, just a change to examples.

Is there any documentation that needs to be updated for this PR?

How do you know this will function as expected in production?

[kimorris27]

Did you forget to commit the change to the preview API? I see that the generated examples changed, but I don't see the code changes.

[cadenmarchese]

@kimorris27 thanks, should be fixed now!

[ehvs]

LGTM
Retriggered e2e for CSP