Make KalmanVertexOnJetAxisSmoother more robust against FPE (ATLASRECTS-7784)

Similar to !66377 (merged), update invertibility check of covariance matrix of vertex with isInvertible method from LU decomposition.

Checked to leave Run 3 reco q445 test outputs unchanged.

Aimed at 23.0 as it affects HeavyIon Tier-0 processing.

FYI ~jmaurer

This merge request affects 1 package:

• Tracking/TrkVertexFitter/TrkJetVxFitter

This merge request affects 1 file:

• Tracking/TrkVertexFitter/TrkJetVxFitter/src/KalmanVertexOnJetAxisSmoother.cxx

added 23.0 JetEtmiss Tracking review-pending-level-1 labels

CI Result SUCCESS (hash c1e69bd7)

	Athena
externals
cmake
make
tests

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For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 79616]

Looks good to me, approving.

Cheers, Philipp (L1)

removed review-pending-level-1 label

added review-approved label

thanks for this one as well!

added review-approved-tier0 label

added review-approved-point1 label

merged

mentioned in commit b9f2b700

mentioned in merge request !66668 (merged)