Override default query threshold for failed pipelines

Release notes

Problem to solve

For the failed pipeline job like jobs/4432816, the query count is greater than the default value 100 and the job failed.

Those kind of jobs can be skipped as a default solution, but we can also find a way to override the maximum query limit instead of skipping the case.

We have to solutions:

1. skip the specs and create the new spec under JH
2. override the const for upstream

stub_const('Gitlab::QueryLimiting::Transaction::THRESHOLD', 120)

Proposal

• prepend a :before block for specified specs

Intended users

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