Adjust HGTD namespaces, removing redundancies
This MR is a follow-up to the changes already made to master in !48066 (merged).
While this MR touches many files, the changes only adjust the HGTD namespaces to remove redundancies. Two are completely removed:
HGTDet, which was being used for HGTD tracking geometry, and
HGTDGeo, which was being used for the HGTD detector factory. A third namespace called
HGTD was removed for names already containing "HGTD" (HGTD clusters and RDOs, along with some reco algs and tools). The names which still remain under the
HGTD namespace are the following (all of which haven't yet been ported to master):