Minor TEvent fixes

Fix TEvent issues discovered in !39406 (comment 4068296)

Also change ut_xaodrootaccess_proxydict_test variable to something more common in R22.

/cc @akraszna

added bugfix label

WARNING: big files (>100K) are found in the changeset

132K in file Control/xAODRootAccess/Root/TEvent.cxx

This merge request affects 1 package:

• Control/xAODRootAccess

This merge request affects 2 files:

• Control/xAODRootAccess/Root/TEvent.cxx
• Control/xAODRootAccess/test/ut_xaodrootaccess_proxydict_test.cxx

Adding @akraszna ,@ssnyder as watchers

added Core master review-pending-level-1 labels

The reason that I didn't open a merge request myself with this was that I thought it would be faster if the small patches to TEvent.cxx would be done as part of !39406 (merged)...

But other than that, and the fact that the copyright dates were not updated , all these updates are good of course.

It probably won't be faster in !39406 (merged) as I have yet to run a lot of tests

And we did decide a while ago that copyright bumps are not needed for trivial changes

CI Result SUCCESS (hash 0db10861)

	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 3
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 25799]

Compilation warnings are unrelated and have already been fixed in !39404 (merged).

Looks good. Approving.

Serhat (L1)

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

merged

mentioned in commit 6c64d260

added sweep:ignore label