Update handle_allocate_error to include errmsg

### What is the feature/what would you like to discuss?

Since the optional `errmsg` argument to allocate is "new" as of fortran 2003, it'd be nice to include it as an optional argument to `handle_allocate_error` (in cam_abortutils.F90) to be added to the overall error message.

We can parallel @jimmielin 's implementation in CAM-SIMA - https://github.com/ESCOMP/CAM-SIMA/pull/311

### Is there anyone in particular you want to be part of this conversation?

_No response_

### Will this change (regression test) answers?

No

### Will you be implementing this enhancement yourself?

Any CAM SE can do this