switch METSignificance tool from AnaToolHandle to ToolHandle+AsgToolConfig

This is switching to the "new" and now recommended mechanism for generating private tools from C++ instead of python. It is a bit more robust than AnaToolHandle, particularly when it comes with interacting with tools configured from the python side.

Marking this as draft as I don't have a good means to test it myself.

Jenkins please retry a build

mentioned in merge request !56084 (merged)

This merge request affects 1 package:

• Reconstruction/MET/METUtilities

This merge request affects 2 files:

• Reconstruction/MET/METUtilities/METUtilities/METSignificance.h
• Reconstruction/MET/METUtilities/Root/METSignificance.cxx

Adding @goetz as watcher

added JetEtmiss Reconstruction analysis-review-required main labels

CI Result SUCCESS (hash 635256a8)

	Athena	AnalysisBase	AthAnalysis
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
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 2749]

added analysis-review-approved label and removed analysis-review-required label

Looks perfect.

marked this merge request as ready

Got no comment, so marking this as ready.

added review-pending-level-1 label

MR looks fine from L1 perspective, CI shows no problems - approving.

Cheers, Yuriy (L1)

removed review-pending-level-1 label

added review-approved label

mentioned in commit 14b79fda

merged