cmssw: HLT-Validation tests failing in IBs of `CMSSW <= 12_1_X`

The HLT-Validation tests are failing in IBs of CMSSW_12_1_X and lower release cycles, e.g. https://cmssdt.cern.ch/SDT/html/cmssdt-ib/#/ib/CMSSW_12_1_X

The main [*] reason of these failures is access to EDM files used by these tests (these files were removed from the CERN Tier-2, some days or weeks ago) [**].

TSG has copies of these files in its EOS area, so the fix is simple: we can replace the path to these files.

Questions to @cms-sw/orp-l2.

• Do we want to fix this? Are PRs still accepted in release cycles as low as 5_3_X?

• If yes, should we also make PRs to release cycles that do not appear on the IB dashboard (e.g. 12_2_X)?

[*] In 10_6_X (and likely some other cycle), these tests will continue to fail (even after fixing the file-access issue) due to other issues.

[**] It might be useful to know from experts if there are ways to cache these files similarly to what is done for the EDM files used in RelVal wfs and addOnTests.