M: backend - add project_id to ci_build_needs table

Summary

Need to add project_id to ci_build_needs table for Cells 1.0

Proposal

Since table has build_id, we can add project_id and use ci_builds.project_id to backfill for ci_build_needs.

Confirm purpose and User Reception (how does this benefit the user?)

Additional details

Some relevant technical details, if applicable, such as:

• Does this need a feature flag?
• Does there need to be an associated instrumentation issue created related to this work?
• Is there an example response showing the data structure that should be returned (new endpoints only)?
• What permissions should be used?
• Is this EE or CE?
  • EE
  • CE
• Additional comments:

Links/References