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WIP:Adjust subdetector envelopes to make room for HGTD

Christian Ohm requested to merge atlas-hgtd/athena:21.9-HGTD-adjust-envelopes into 21.9

(This MR is the last broken-up set of changes from !34928 (merged) which got a bit out of control and hard to debug)

Several adjustments to the envelopes for the various ATLAS volumes, to make room for HGTD outside of the CALO envelope:

  • IDET should not include HGTD (for now), and therefore stop at z = +- 3420 when HGTD is turned on
  • CALO should not include HGTD in 21.9 (it did in 20.20), and therefore leaves r < 1148 mm open in 3420 mm < |z| < 3545 mm.
  • When HGTD is not turned on, there should be no changes (to allow for MBTS to be built inside of CALO)
  • Lots of discussions have happened in ATLSWUPGR-70, with help from many experts.

This MR needs !34966 (closed) before it is expected to work, so marking as WIP for now.

Best, Christian

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