Merge topic 'openxr-custom-dir'

d0bb8ff6 Allow specifying a custom path to look for controller models
b7c8f2b0 Allow users to define a custom directory to look for RemotingXR.json

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: Lucas Givord <lucas.givord@kitware.com>
Merge-request: !11918