Updated hpc-stack modules and compiler flags for building SRW release/public-v2 on MacOS

[natalie-perlin]

DESCRIPTION OF CHANGES:

Changed a build template for the MacOS system to use the hpc-stack modules built for the release/public-v2 SRW version, a file ./modulefiles/build_macos_gnu .
Recipe for building the hpc-stack for this release on a MacOS using the GNU compiler suite, for either M1/arm64 or Intel/x86_64 chips could be found in HPC-stack repo:
https://github.com/NOAA-EPIC/hpc-stack.git, release/public-v2 branch; it will be later merged with the hpc-stack NOAA-EMC repository. Currently it could be cloned as following:
git clone -b release/public-v2 https://github.com/NOAA-EPIC/hpc-stack.git hpc-stack.git

TESTS CONDUCTED:

The SRW was build and tested (single test 2019051600) based on the hpc-stack for release/public-v2. Tho MacOS systems tested: M1/arm64 with Darwin 20/Big Sure, Intel/x86_64 with Darwin 19/Catalina, build has been also tested on M1/arm64 with Darwin 21/Monterey.

DEPENDENCIES:

HPC-stack recipe built for this release:

• NOAA-EPIC/hpc-stack/release/public-v2
• Bugfix when building MPICH with gfortran-10. NOAA-EMC/hpc-stack#250

DOCUMENTATION:

The documentation is under a separate PR

ISSUE (optional):

1. This resolves dependence of syncing the modules loaded to build and run the SRW release/public-v2 on MacOS.
2. Modulefiles build_macos_gnu, wflow_macos could be loaded. Env. variable LDFLAGS needs to be set up (exported) after loading build_macos_gnu; wflow_macos needs to have "puts" in place of "system" calls.

See discussion under the PR #238

Contributors:
@danielabdi-noaa

[JeffBeck-NOAA]

@natalie-perlin, can you change the title of this PR to reflect that these changes are only for MacOS? Thanks!

[JeffBeck-NOAA]

@willmayfield, does this look good to you?

[danielabdi-noaa]

@natalie-perlin This looks good to me. Sorry that the only way to get LDFLAGS working in build_macos_gnu seems to be if it was written in Lua according to this document. Maybe printing a message at the end of build_macos_gnu will do for now, but it is not an ideal solution either.

set shell [module-info shelltype]
if {$shell == "sh"} {
   puts stderr {Please execute this command:
        > export LDFLAGS=-L$MPI_ROOT/lib}
} else {
   puts stderr {Please execute this command:
        > setenv LDFLAGS -L$MPI_ROOT/lib}
}