Move to const DataHandle

This MR moves to using const DataHandles to retrieve the CscIdHelper (following a fix in 21.3: !28283 (merged)).

This MR should go in ideally before building the next 21.0 release, thus adding the urgent label.

Adding @jchapman and @pottgen

added urgent label

This merge request affects 1 package:

• MuonSpectrometer/MuonCnv/MuonEventAthenaPool

Adding @rosati ,@nkoehler ,@wleight as watchers

added 21.0 MuonSpectrometer review-pending-level-1 labels

mentioned in merge request !28302 (merged)

mentioned in merge request !28303 (merged)

CI Result FAILURE (hash 0050b9fe)

	Athena	AthDataQuality	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthDataQuality: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 41667]

Tests failed due to timeout, retrying

Jenkins please retry a build

This merge request affects 1 package:

• MuonSpectrometer/MuonCnv/MuonEventAthenaPool

Adding @rosati ,@nkoehler ,@wleight as watchers

CI Result SUCCESS (hash 0050b9fe)

	Athena	AthDataQuality	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthDataQuality: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 41682]

added sweep:ignore label

Approving the MR, following 21.3 branch decission. Eric, L1

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

merged

mentioned in commit e2e3a85d

mentioned in merge request !28989 (merged)

mentioned in commit 1e705b32