MOM6 GUST_CONST as a variable

[NeilBarton-NOAA]

Description

The MOM6 GUST_CONST variable changes depending on experiment/system. However, it is hardcoded to 0.02 in ufs scripting.

Solution

Add MOM6_GUST_CONST as a variable.

Alternatives

Related to

[sanAkel]

@NeilBarton-NOAA an alternative could be to have a set of:

• MOM_input
• MOM_layout
• MOM_override
  That makes you happy! That way we will not these endless PR changing one char but touching > 1 file!

If that's a path you want to explore, let me know.