DcmEmulator: Add new option maxEventRateHz to control the input rate

- Use FindPython rather than PythonLibs
- DcmEmulator: Move shared memory management from event level to session level

HLTMPPy: re-read RunParams on start in interactive mode

DcmEmulator: fix bug for one-event files (!32)

Remove idle printouts (!31)

Add scriptAfterFork feature

Add affinityCoresPerThread parameter

https://gitlab.cern.ch/atlas-tdaq-software/HLTMPPU/-/merge_requests/29

Make loading of MonSvcInfoService optional and add support for schema files (!27)

MonSvcInfoService: fix for LBN histogram naming (!26, ADHI-4860)

- Fix longest processing time calculation
- Use system_clock for synchronizing IS publications (ADHI-4857)

Fix Python 3.8 syntax warnings

Fix for Jira ADHI-4840

DcmEmulator: Change output file stream type and name (!20)

Fix for Python2 build

Moved to the use of dfinterfacedcm tryGetNextUntil function also for finalizeSession (HLTMPPU!15)

Make skipFinalizeWorker the default

Fix ATR-20893 and ADHI-4796.

- fix processing of last event in file in emulator mode
- fix Py3 print formatting

Add `getNextTimeout` parameter (ADHI-4728) to python dictionary.