Re-add bremsstrahlung test

The (to-be) removed Hlt2Conf.test_hlt2_bremsstrahlung test has to be added back in with modern/functional code.

see MR and comment: !2248 (comment 6675489)

added RTA testing labels

mentioned in merge request !2248 (merged)

fyi: @pkoppenb @mvesteri @poluekt @cmarinbe

Thanks @mveghel

Writing down what needs to be done more explicitly as I am reminding myself of what the test does (see https://gitlab.cern.ch/lhcb/Moore/-/blob/e9ffed531fd31dc73d49894dfacc5ad0f9b43cf3/Hlt/Hlt2Conf/tests/options/test_bremsstrahlung.py):

• ParticleFilterWithPVs uses FilterDesktop and should be changed to the new equivalent class, ie ParticleFilter from algorithms_thor.py
• anticipating the removal of CombineParticles, it should be changed to TwoBodyCombiner

can you confirm the above is correct in terms of LoKi -> Thor migration @pkoppenb @mvesteri @poluekt ?

mentioned in merge request !2373 (merged)

assigned to @alopezhu

@alopezhu is this done, can this be closed?

We were waiting for 2024 mc samples and a dd4hep configuration for them, I'll retake it this week. The test wasn't passing in dd4hep, just in detdesc.

okay! thanks

closed with merge request !2373 (merged)

mentioned in commit c3e8752b