StoreGate: Allow returning range through WriteCondHandle::isValid.

Extend WriteCondHandle::isValid to allow also returning the corresponding IOV range.

This merge request affects 1 package:

• Control/StoreGate

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS (hash 977bd0fc)

	Athena	AthSimulation	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 4
AthSimulation: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 11779]

WARNINGs are not related to this MR.

The changes look good, and CI passes. Approving.

Xiaozhong (L1)

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

merged

mentioned in commit 651d4fe9

added sweep:ignore label