TrigNavigation: fix deserializaton/thinning of Run-1 navigation

In !43270 (merged) caching of deserialized navigation blobs was implemented. However, when multiple navigation instances are used the corresponding holders also need to be cached and registered in each navigation instance.

Also throw an error in the thinning service in case the list of holders in the navigation is empty. This should never happen and would point to an issue in the initialization of the navigation.

Fixes ATR-25282 and required for ATR-25291.

marked this merge request as ready

This merge request affects 2 packages:

• Trigger/TrigEvent/TrigNavTools
• Trigger/TrigEvent/TrigNavigation

Affected files list will not be printed in this case

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash 89a367ec)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
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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 49484]

removed review-pending-level-1 label

added review-approved label

changed the description

merged

mentioned in commit 2b89be02

added sweep:ignore label