ExpressionEvaluation: const fixes

Fix some thread-checker warnings about calling non-const functions on members:

• make TMethodCollectionWrapper::variableType non-const
• Make getVec[Int,Double]Value non-const

Also suppress some unavoidable const-casts due to ROOT interfaces.

Build area was cleaned as per request posted in the DB. The full software build will be performed

This merge request affects 1 package:

• PhysicsAnalysis/CommonTools/ExpressionEvaluation

This merge request affects 3 files:

• PhysicsAnalysis/CommonTools/ExpressionEvaluation/ExpressionEvaluation/xAODVariableProxyLoaders.h
• PhysicsAnalysis/CommonTools/ExpressionEvaluation/Root/xAODVariableProxyLoaders.cxx
• PhysicsAnalysis/CommonTools/ExpressionEvaluation/src/MethodAccessor.h

added Analysis JetEtmiss master review-pending-level-1 labels

CI Result SUCCESS (hash 02b521fb)

	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 61478]

Looks good, approving - L1

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

mentioned in commit af679c61

merged

added sweep:ignore label