Update tracking region rmax and zmax envelope

The current tracking envelope in here is not well-aligned with the actual tracking volume. It is currently

<constant name="tracker_region_rmax" value="1.2*m"/>
<constant name="tracker_region_zmax" value="4.0*m"/>

but this extends into the solenoid in the radial direction, and into the calorimeter in the z direction. This is a big deal, since we might want to use a particle handler in DD4hep (for example) that relies on knowing where the tracker is.

I propose EITHER:

<constant name="tracker_region_rmax" value="1160*mm"/>
<constant name="tracker_region_zmax" value="3150*mm"/>

which are bounds set by the solenoid in r, and the Ecal in z,

OR:

<constant name="tracker_region_rmax" value="1080*mm"/>
<constant name="tracker_region_zmax" value="3030*mm"/>

which are the (experimentally determined) limits of the tracker sensitive material, seen here as a black box, entirely encompassing the blue tracker hits in an event:

My preference is actually the latter, since that is the point to which we can say a particle is "tracked". After that, it will start showering.