Validate foreign keys targeting p_ci_builds

What does this MR do and why?

The FKs that are being validated here were introduced in !121718 (merged) and have been asynchronously validated over the weekend. Now we're validating them on all other environments and on .com they will be op-op changes.

Note that it doesn't include all of the FKs added in the previous MR, it only validates the ones that were successfully added.

Related to #414396 (closed)

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

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

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #382033 (closed)