Mark resolve this vulnerability as deprecated

What does this MR do and why?

As we are migrating to the GA version of this feature, I am marking the current components as deprecated. This will make it easier to clean up once the updated Vulnerability Resolution is complete.

Note: Because this feature is an experiment, it doesn't need to follow the standard deprecation procedure, no prior announcement need to be made.

Screenshots or screen recordings

There should be not UI/UX changes, everything should work the same:

How to set up and validate locally

1. In order to run a pipeline to generate a Vulnerability report, you'll need an EE license.
2. Fork https://gitlab.com/gitlab-org/security-products/tests/webgoat.net
3. Run a pipeline against the default branch. It will generate vulnerabilities.
4. Go to the project vulnerability report page
5. Click on the SAST vulnerability
6. You will see the experiment version of the "Resolve with AI" button

Numbered steps to set up and validate the change are strongly suggested.

Related to #464615 (closed)