Fix NAG Fortran build on macOS for GEOSldas

[weiyuan-jiang]

This commit enables successful compilation of GEOSldas with NAG Fortran compiler on macOS by addressing three critical issues:

1. NAG_Fortran.cmake (line 9):

   • Add MPI_Gather, MPI_Scatter, MPI_Alltoallv to MISMATCH flag
   • Fixes MPI type mismatch errors where different data types are passed to the same MPI function in different call sites

2. NAG_Fortran.cmake (lines 20-28):

   • Configure CMake to use -I flag for Fortran includes
   • Clear CMAKE_Fortran_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES
   • Prevents CMake from adding -F framework flags that NAG doesn't support
   • Fixes Fortran include path generation issues

3. NAG_Fortran.cmake (lines 32-41):

   • Add -w=uep flag to suppress unrecognized option errors on macOS
   • Handles any remaining framework-related warnings gracefully

4. FindBaselibs.cmake (lines 99-108):

   • Replace find_library() calls with direct framework names
   • Changes: find_library(FWSecurity NAMES Security) to: set(FWSecurity "-framework Security")
   • Prevents CMake from adding framework directories to Fortran include paths, which causes compilation errors with NAG

Without these changes, NAG Fortran fails to compile GEOSldas on macOS due to:

• Unrecognized -F framework flags in Fortran compiler invocations
• Malformed include paths missing -I separators
• MPI function type mismatch errors

Tested on: macOS with NAG Fortran 7.2.43, OpenMPI 5.0.10rc2, Baselibs 9.9.0
Build result: 100% successful, all executables built