Validate FK for p_ci_builds.upstream_pipeline_id

What does this MR do and why?

Validate FK fk_87f4cefcda_p for all p_ci_builds partitions:

• Async FK validation for ci_builds is done (see https://console.postgres.ai/gitlab/gitlab-production-ci/sessions/30669/commands/95283)
• Async FK validation for gitlab_partitions_dynamic.ci_builds_101 is done (see https://console.postgres.ai/gitlab/gitlab-production-ci/sessions/30669/commands/95284)
• Async FK validation for gitlab_partitions_dynamic.ci_builds_102 is done (see https://console.postgres.ai/gitlab/gitlab-production-ci/sessions/30669/commands/95285)

MR acceptance checklist

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Before	After

How to set up and validate locally

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

Related to #436529 (closed)