Add more specific ID type for DastSiteProfiles

What does this MR do?

this merge request switches dast_site_profile id types over to an enriched type which adds additional capabilities for easily detecting when we use the wrong type of global id (see !36331 (merged) for more context).

i've coordinated with frontend and, since this functionality is behind a feature flag, it does not represent a breaking change.

additionally, since this is behind a feature flag, i have not added a changelog entry as per guidelines.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry behind feature flag
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team