[CI][GEOM] Disable sampling part of overlap check macro

- Make overlap threshold optional input parameter (default = 0.0001 as before)
- Make sampling controllable by flag (disabled by default)
- Make number of samples in sampling mode controllable by input par (default = 0 leading to ROOT default of 1M)

Two problems from ROOT side lead to it being unrelyable for now
- Threshold is not working in this method
- Changing the number of samples lead to really small overlaps apearing and disappearing

See https://github.com/root-project/root/issues/14675 for reference