Add token-id to dastSiteTokenCreateMutation

What does this MR do?

Adds an id selection-field to the dastSiteTokenCreate mutation, as it is needed to create a site validation.

It gets passed down to <dast-site-validation> and is then needed when creating the dastSiteValidationCreateMutation.

See related discussion: !41225 (comment 414002838)

Does this MR meet the acceptance criteria?

Conformity

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

Related to #238578 (closed)