AthenaMonitoringKernel: always set kAlwaysCreate for lumiblock histograms online

For the correct functioning of the Gatherer, lumiblock histograms should always be created with the kAlwaysCreate option to ensure they are re-booked on each LB change.

Relates to ADHI-4947.

cc @salnikov

P.S.: Should have really done this a long time ago. I was reminded by @stelzer in !64147 (merged).

added full-unit-tests label

This merge request affects 1 package:

• Control/AthenaMonitoringKernel

This merge request affects 2 files:

• Control/AthenaMonitoringKernel/python/GenericMonitoringTool.py
• Control/AthenaMonitoringKernel/test/test_defineHistogram.py

Adding @gemmeren ,@ssnyder ,@maszyman as watchers

added 23.0 Core DQ review-pending-level-1 labels

CI Result FAILURE (hash 4c61fa35)

	Athena
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 73946]

mentioned in merge request !64154 (merged)

Unrelated unit test failures, which should be fixed by !64154 (merged) but no need to re-run CI.

The InDetOverlay tests are indeed the only ones that fail, so approving from L1.

added review-approved label and removed review-pending-level-1 label

added review-approved-tier0 label

added review-approved-point1 label

merged

mentioned in commit b9677084

mentioned in merge request !64182 (merged)