v3.241029

Make crab recover test successful in CV and cleanup/restructure it a bit

What's Changed

• report failing reason to log and console. FIx #5342 by @belforte in #5343

Full Changelog: v3.241025...v3.241029

• CV validation: dmwm/CRABServer#8752

• deploy as crab-dev via cms-sw/cmsdist#9489

• available as crab-dev in IB as of Oct 31

• testing (CV + CCV)

  • with preprod (v3.241018 TW and REST) : dmwm/CRABServer#8760 - OK
  • with prod (v3.241017 TW and v3.240904 REST) : dmwm/CRABServer#8761 - CCV OK but CV discovered a bug in crab recover #5344