Build rdbfmsua.x with a traditional makefile

[aerorahul]

Description

This PR:

• builds rdbfmsua.x with a traditional makefile instead of cmake due to problems with gempak and cmake. The issues are documented in Build rdbfmsua on Hera, Orion, and WCOSS2 #50
• skips building the above executable if the modulefile for this executable is not found.
• only supports wcoss2, hera and orion at the moment where gempak is available.

Fixes #54

Type of change

• Maintenance

Change characteristics

• Is this a breaking change (a change in existing functionality)? NO
• Does this change require a documentation update? NO

How has this been tested?

Builds on hera, wcoss2
Runs will be tested at a later time with the workflow.

Checklist

• Any dependent changes have been merged and published
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing tests pass with my changes
• I have made corresponding changes to the documentation if necessary

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