Fix for ITk pixel conditions following !46680

!46680 (merged) caused issues for ITkPixel conditions, as can be seen here in Digi ART tests:

https://atlas-art-data.web.cern.ch/atlas-art-data/grid-output/master/Athena/x86_64-centos7-gcc8-opt/2021-09-23T2101/DigitizationTests/test_Digi_tf_RUN4_ttbar_no_pileup/tarball_logs/log.HITtoRDO

The same logic as applied for the SCT alg in the above MR has been added for the Pixel alg, which fixes the issue for ITkPixel (since it also uses the Pixel implementation currently).

FYI @tlari