MuonCablingData: Add missing include<set>

This is yet another MR that adds a missing #include<set> for the dev4LCG builds. Previous MRs are !60855 (merged) and !60817 (merged)

Tagging @jojungge for info.

This merge request affects 1 package:

• MuonSpectrometer/MuonCablings/MuonCablingData

This merge request affects 1 file:

• MuonSpectrometer/MuonCablings/MuonCablingData/src/MdtMezzanineCard.cxx

Adding @apsallid ,@rosati ,@wleight ,@pscholer ,@stavrop ,@jojungge as watchers

added MuonSpectrometer master review-pending-level-1 labels

CI Result SUCCESS (hash 49766432)

	Athena
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 67430]

in principle the iostream inclusion here is redundant unless the iostream in the header is changed to an iosfwd (which seems possible?); also the header should include cstdint for all the uint8_t etc.

resolved all threads

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

added review-approved-tier0 label

merged

mentioned in commit c62dafbf

added sweep:ignore label