Sweeping !55693 from master to 22.0. xAODRootAccess: Prepare for possible migration to 64-bit sgkey_t.

xAODRootAccess: Prepare for possible migration to 64-bit sgkey_t.

See merge request !55693 (merged)

added sweep:from master label

Adding original author @ssnyder as watcher.

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

140K in file Control/xAODRootAccess/Root/TEvent.cxx

This merge request affects 2 packages:

• Control/xAODRootAccess
• Control/xAODRootAccessInterfaces

Affected files list will not be printed in this case

Adding @akraszna ,@ssnyder as watchers

added 22.0 Core review-pending-level-1 labels

CI Result SUCCESS (hash 1df48f2f)

	Athena	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
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 57129]

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

added review-approved-point1 label

merged

mentioned in commit 806403bd