Update build for new GTG method

[WalterKolczynski-NOAA]

Expected behavior
Those with GTG access should be able to build post with GTG.

Current behavior
UPP does not build with GTG.

Machines affected
All

To Reproduce

1. Run checkout with -o to include GTG code (authorized users only).
2. Run build_upp.sh.

Context
UPP recently updated the way in which GTG is built. Instead of the manual copying of source code to overwrite the normal versions, there is a compile option that will include the GTG code (see NOAA-EMC/UPP/pull/435).

Detailed Description
The compile_upp.sh script within UPP now has a -g option to compile with the GTG module.

Possible Implementation
Will need a new option in build_upp.sh and build_all.sh to build to enable an operational code that builds with GTG (similar to what checkout.sh uses).

[WalterKolczynski-NOAA]

OBE. GTG was removed from workflow checkout in PR #1642.