InDetReadoutGeometry+SCT_ConditionsAlgorithms: SiDetectorElementCollection should have mixed conditions
This is a manual cherry-pick of MR !46653 (merged) into the 22.0-mc20 branch.
Original MR description:
PixelDetectorElementCondAlg produces SiDetectorElementCollection but with mixed runlbn / timestamp IOVs. So we need to declare that this type uses mixed conditions.
Force SCT_DetectorElementCondAlg to produce a mixed IOV as output, in order to be compatible with PixelDetectorElementCondAlg. They both produce the same type, SiDetectorElementCollection, which the pixel algorithm requires to be mixed.
See ATEAM-778.