Addition of GeoBCMPrimeTool into SLHC_Setup_ITK.py

Very small merge request before new 21.9 rel is fixed.

This merge request affects 1 package:

• InnerDetector/InDetExample/InDetSLHC_Example

Adding @goetz ,@sroe as watchers

added 21.9 InnerDetector review-pending-level-1 labels

CI Result SUCCESS (hash 402e5619)

	Athena
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 120
For experts only: Jenkins output [CI-MERGE-REQUEST 42841]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit fc1db4cd