Support azure keyvault certificates client

[Meir017]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

I'm trying to read certificates from azure keyvault

Describe the solution you'd like

either enhance the #3930 to support certificates or introduce a new Aspire.Azure.Security.KeyVault.Certificates library

Additional context

No response

[davidfowl]

Fixed in #8408