Missing .cmake files for intel-classic builds

[gdicker1]

Since there are no intel-classic equivalents to intel-oneapi.cmake and intel-oneapi_derecho.cmake in machines/cmake_macros, builds of CESM compsets will fail in the share external due to missing CPRINTEL preprocessor macro in shr_infnan_mod.F90.in.

Example error messages:

 path_to/CESM/share/src/shr_infnan_mod.F90.in(71): error #7950: Procedure name in MODULE PROCEDURE statement must be the name of accessible module procedure.   [SHR_INFNAN_ISNAN_DOUBLE]
    module procedure shr_infnan_isnan_double
 --------------------^
 path_to/CESM/share/src/shr_infnan_mod.F90.in(73): error #7950: Procedure name in MODULE PROCEDURE statement must be the name of accessible module procedure.   [SHR_INFNAN_ISNAN_REAL]
    module procedure shr_infnan_isnan_real
 --------------------^
 path_to/CESM/share/src/shr_infnan_mod.F90.in(71): error #7407: Unresolved MODULE PROCEDURE specification name.   [SHR_INFNAN_ISNAN_DOUBLE]
    module procedure shr_infnan_isnan_double
 --------------------^
 path_to/CESM/share/src/shr_infnan_mod.F90.in(73): error #7407: Unresolved MODULE PROCEDURE specification name.   [SHR_INFNAN_ISNAN_REAL]
    module procedure shr_infnan_isnan_real
 --------------------^
 compilation aborted for shr_infnan_mod.F90 (code 1)

Steps to reproduce:

• Download and checkout_externals a clone of CESM (e.g. cesm2_3_alpha17a)
• Create and setup any case using --compiler intel-classic (tested with FHS94)
• Attempt a build

Proposed fix:
Create softlinks in machines/cmake_macros intel-classic.cmake to intel.cmake and intel-classic_derecho.cmake to intel_derecho.cmake.