Do not arbitrarily release Python GIL in HLTControlFlowMgr

!3340 (merged) introduced an unconditional release of Python GIL while the problem should have been handled in Gaudi as done in gaudi/Gaudi!1369 (merged) and gaudi/Gaudi!1387 (merged). Moreover the unconditional release of the GIL prevent running the HLTControlFlowMgr from Gaudi.exe (for example in test workflows like gaudirun.py -n -o myopts.opts some_complicated_options.py && Gaudi.exe myopts.opts).

added RTA label

mentioned in merge request gaudi/Gaudi!1387 (merged)

mentioned in merge request gaudi/Gaudi!1388 (merged)

mentioned in issue Moore#487 (closed)

assigned to @gunther

added Core label

/ci-test

added ci-test-triggered label

• [2022-10-31 15:36] Validation started with lhcb-master-mr#6067

assigned to @jonrob and unassigned @gunther

resolved all threads

added Configuration label

removed Configuration label

merged

mentioned in commit 820bf659

unassigned @jonrob

picked the changes into the branch cherry-pick-820bf659 with commit c9752eb5

mentioned in commit c9752eb5

mentioned in merge request !3949 (merged)