CI: Check in the CI that assert_raises_regex is not being used (#23627)
CI: Check in the CI that assert_raises_regex is not being used (#23627)

Follow-up to gh-23592.
jreback/pandas,GuessWhoSamFoo/pandas,gfyoung/pandas,rs2/pandas,datapythonista/pandas,MJuddBooth/pandas,cbertinato/pandas,GuessWhoSamFoo/pandas,jreback/pandas,jorisvandenbossche/pandas,cbertinato/pandas,gfyoung/pandas,toobaz/pandas,gfyoung/pandas,jreback/pandas,GuessWhoSamFoo/pandas,pandas-dev/pandas,jreback/pandas,toobaz/pandas,dsm054/pandas,pandas-dev/pandas,rs2/pandas,dsm054/pandas,TomAugspurger/pandas,datapythonista/pandas,datapythonista/pandas,TomAugspurger/pandas,cbertinato/pandas,MJuddBooth/pandas,pandas-dev/pandas,TomAugspurger/pandas,rs2/pandas,gfyoung/pandas,MJuddBooth/pandas,MJuddBooth/pandas,toobaz/pandas,dsm054/pandas,jorisvandenbossche/pandas,GuessWhoSamFoo/pandas,GuessWhoSamFoo/pandas,toobaz/pandas,jorisvandenbossche/pandas,pandas-dev/pandas,TomAugspurger/pandas,dsm054/pandas,dsm054/pandas,datapythonista/pandas,gfyoung/pandas,toobaz/pandas,jreback/pandas,cbertinato/pandas,jorisvandenbossche/pandas,rs2/pandas,cbertinato/pandas,MJuddBooth/pandas