set is_allocated in all horiz_interp_type_new routines

[rem1776]

Description Sets the is_allocated field as well as the method_type within horiz_interp_types when called from any of the method specific horiz_interp_new routines. This should prevent reallocation errors as described in the issue below.

Also adds some calls to the unit test to test this functionality and renames one of the CPP macros to make more sense.

Fixes #1533

How Has This Been Tested? make distcheck with oneapi 2024.01 on amd box

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] Any dependent changes have been merged and published in downstream modules
• [x] New check tests, if applicable, are included
• [x] make distcheck passes

[rem1776]

@thomas-robinson @bensonr This should be ready now, I updated the SPHERICA to SPHERICAL. I noticed that the interpolation method values were made public in the libFMS.F90 file so I also removed them from there as well since they should only be internal.