Merge branch 'MC_MT_test' into 'master'

MT version of standard MC test

See merge request atlas/athena!35034

Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_MT_build.py

+#!/usr/bin/env python
+
+# art-description: Trigger RDO->RDO_TRIG athena test of the Dev_pp_run3_v1 menu with 2 slots and 2 threads
+# art-type: build
+# art-include: master/Athena
+# Skipping art-output which has no effect for build tests.
+# If you create a grid version, check art-output in existing grid tests.
+
+from TrigValTools.TrigValSteering import Test, ExecStep, CheckSteps
+
+ex = ExecStep.ExecStep()
+ex.type = 'athena'
+ex.job_options = 'TriggerJobOpts/runHLT_standalone.py'
+ex.input = 'ttbar'
+ex.threads = 2
+ex.concurrent_events = 2
+precommand = ''.join([
+  "setMenu='LS2_v1';",  # LS2_v1 soon to be renamed to Dev_pp_run3_v1
+  "doWriteBS=False;",
+  "doWriteRDOTrigger=True;",
+  "fpeAuditor=True;"
+])
+ex.args = '-c "{:s}"'.format(precommand)
+
+test = Test.Test()
+test.art_type = 'build'
+test.exec_steps = [ex]
+test.check_steps = CheckSteps.default_check_steps(test)
+
+import sys
+sys.exit(test.run())