pseudomerge of TrigHLTMonitoring  packages from rel 21 to master, ATR-18999

See merge request atlas/athena!20813

TileRec: Move large arrays into separately-allocated objects.

See merge request atlas/athena!20982

TrigPartialEventBuilding: cmake fix

See merge request atlas/athena!20984

ART egammaValidation. Adding prefix to input containers

See merge request !20968

New configuration system for jet reconstruction -- take 2

See merge request atlas/athena!20964

TileByteStream: Another pattern to ignore.

See merge request atlas/athena!20983

Disable unsupported unit-tests for master,AthSimulation builds

Closes ATLASSIM-4013

See merge request atlas/athena!20967

Sweeping !20668 from 21.0 to master.
Fix name of the test mc_pp_v7_rdotoaodslim_build

See merge request atlas/athena!20887

Configuration of ATLAS Detector Description using ComponentAccumulator

See merge request atlas/athena!20770

cmake typo: PRIVATE used instead of PRIVATE_LINK_LIBRARIES.

Update reference file comparison so as to not fail if SimFlags are
not available.

ubsan can give false positives for classes using virtual derivation that
have excessive space in member variables.  Resolve by moving the large
member arrays to a separately allocated object.

Fixes ubsan warnings seen in gcc8 dbg build.

Should fix ATLASSIM-4013.

This commit adds an initial attempt add configuring the description of the
whole ATLAS detector in GeoModel using ComponentAccumulator.

It also adds tests for building the full Atlas geometry based on different
input file types.

Update Output ConfigFlags in AllConfigFlags module.
- Replace `Output.HITFileName` with `Output.HITSFileName` to match
grid output naming convention.
- Add `Output.EVNTFileName`.

Add default HITS and EVNT and ESD input files for tests to AthenaConfiguration.TestDefaults module

Remove some unneeded debug messages from muon trigger hypos

See merge request atlas/athena!20948

AthenaPoolExampleAlgorithms: Update reference files.

See merge request atlas/athena!20949

MuonConfig: Update reference files.

See merge request atlas/athena!20944

FIX diff-root ignore functionality so it works with xAOD files

See merge request atlas/athena!20942

Merge branch 'AddFTKoffMon' into '21.3'

See merge request atlas/athena!20935

Resolving conflict with updated master. Changes in TrigHLTMonitoring/share/addMonTools.py and TrigHLTMonitoring/share/HLTMonitoring_topOptions.py

Temporary fix of the problem with the missing histogram in TrigMuonMonitoring; to be followed up in ATR-19400

Add a helper function to identify BMG chambers

See merge request atlas/athena!20941

AthenaPoolMultiTest: Update reference file.

See merge request atlas/athena!20943

PersistentDataModel: Fix cppcheck warnings.

See merge request atlas/athena!20926