MuonRDO+EventBookkeeperMetaData: Avoid warnings about implicitly-declared assignment.

Remove explicit copy ctor to avoid warnings about implicitly-declared assignment.

This merge request affects 2 packages:

• Event/EventBookkeeperMetaData
• MuonSpectrometer/MuonRDO

Affected files list will not be printed in this case

Adding @apsallid ,@kluit ,@stavrop ,@gemmeren ,@pscholer ,@jojungge ,@rosati as watchers

added EDM MuonSpectrometer Trigger main review-pending-level-1 labels

CI Result SUCCESS (hash a929e877)

	Athena	AthSimulation	AthGeneration	AthAnalysis
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
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 3001]

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

merged

mentioned in commit 9f598f9b