IntelLLVM: Enable Fortran module rebuild avoidance in Makefile generators

The Makefile generators use an internal `cmake -E cmake_copy_f90_mod`
tool to avoid rebuilding module consumers when the `.mod` content
changes only in a trivial way (e.g. the time it was built).  This is
done with logic specific to each vendor's module file format.  Enable
the "Intel" format support when using the IntelLLVM compiler (ifx) too.

Issue: #22922