Migrated to use v2 interfaces from gFTL

Changed

• Updated pFUnit to use v2 template interfaces
• Added -quiet flag for NAG Fortran
• Remove macos-11 from GitHub Actions, add macos-12 and gfortran-14 to Ubuntu 24.04
• Updated fArgParse to v1.8.0

Added

• LLVMFlang compiler support

Fixed

• Fixes some ctest failures