RUN AS-IF-FOSS: Add ci_build_metadata.secrets to ignored jsonb columns

What does this MR do?

Fixes a master:foss-broken issue

!34480 (merged) introduced this column and associated validator, but since the validator is in ee/, it isn't present when running the specs with FOSS_ONLY=1. This interacts badly with the recently-introduced validate-the-validators spec: !33641 (merged)

This short-term fix will get foss master green again, but we'll need to think more deeply about how to handle this case, since we don't want to ignore the columns forever.

Does this MR meet the acceptance criteria?

Conformity

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

Closes #223195 (closed)