[ATR-22774][ATR-22732] Further x2 MT protections for full R2 navigation framework

Additional MT protection

• There can be multiple thinning services in RAWtoALL, change the mutex here to be static to cover them all.
• The thinning service and monitoring both make use of the same underlying (singleton) thread-hostile legacy trigger navigation tool. !40884 (merged) reduced the number of issues, but did not eliminate them.

This MR serialises all legacy HLT monitoring and thinning.

It reduces the frequency of MT-crashes, but still does not eliminate them. A x3 follow up will still be needed.

This merge request affects 2 packages:

• Control/AthenaMonitoring
• Trigger/TrigEvent/TrigNavTools

Affected files list will not be printed in this case

Adding @ssnyder as watcher

added Core DQ Trigger master review-pending-level-1 labels

added 1 commit

• 5dcb6e1c - make singleton

Compare with previous version

This merge request affects 2 packages:

• Control/AthenaMonitoring
• Trigger/TrigEvent/TrigNavTools

Affected files list will not be printed in this case

Adding @ssnyder as watcher

CI Result SUCCESS (hash 5dcb6e1c)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 29083]

CI Result SUCCESS (hash 1ff911f2)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 29081]

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

merged

mentioned in commit 73b7d0bd

added sweep:ignore label