InDetTrackSelectionTool: Fix thread-safety checker warnings.

Fix some new thread-safety checker warnings. Const fixes.

added alsoTargeting:22.0 label

There were multiple CI triggers for this MR and commit. The system ignored duplicates but the GitLab pipeline status may incorrectly show the job as failed. Once the remaining job finished running, the CI results will be posted as usual.

This merge request affects 1 package:

• InnerDetector/InDetRecTools/InDetTrackSelectionTool

This merge request affects 4 files:

• InnerDetector/InDetRecTools/InDetTrackSelectionTool/InDetTrackSelectionTool/InDetTrackSelectionTool.h
• InnerDetector/InDetRecTools/InDetTrackSelectionTool/Root/InDetAccessor.cxx
• InnerDetector/InDetRecTools/InDetTrackSelectionTool/Root/InDetAccessor.h
• InnerDetector/InDetRecTools/InDetTrackSelectionTool/Root/InDetTrackSelectionTool.cxx

Adding @goetz ,@amorley ,@dshope ,@sroe as watchers

added InnerDetector analysis-review-required master review-pending-level-1 labels

CI Result SUCCESS (hash 2ff18984)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 59634]

Approved
Albert (L1)

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

Does not concern analysis release, approving

Giovanni (AR)

removed analysis-review-required label

added analysis-review-approved label

merged

mentioned in commit ddbe05a0

added sweep:done label

picked the changes into the branch cherry-pick-ddbe05a0a9a-22.0 with commit f338d645

Sweep summary
successful:

• 22.0

(see https://aiatlas154.cern.ch/jenkins/job/auto_git_sweeps/3181/console for details)

mentioned in commit f338d645

mentioned in merge request !57201 (merged)

mentioned in commit 418484ca