Cgns fix no fortran config (#40241)

* SEACAS: Update package.py to handle new SEACAS project name

The base project name for the SEACAS project has changed from
"SEACASProj" to "SEACAS" as of @2022-10-14, so the package
needed to be updated to use the new project name when needed.

The refactor also changes several:
    "-DSome_CMAKE_Option:BOOL=ON"
to
   define("Some_CMAKE_Option", True)

* CGNS: If fortran not enabled, do not specify parallel fortran compiler

* Update package formatting as suggested by black

* Accept suggested change

var/spack/repos/builtin/packages/cgns/package.py

@@ -87,6 +87,7 @@ def cmake_args(self):
                 self.define_from_variant("CGNS_ENABLE_LEGACY", "legacy"),
                 self.define_from_variant("CGNS_ENABLE_MEM_DEBUG", "mem_debug"),
                 self.define_from_variant("CMAKE_POSITION_INDEPENDENT_CODE", "pic"),
+                self.define_from_variant("CGNS_ENABLE_64BIT", "int64"),
             ]
         )
 
@@ -95,11 +96,10 @@ def cmake_args(self):
                 [
                     "-DCMAKE_C_COMPILER=%s" % spec["mpi"].mpicc,
                     "-DCMAKE_CXX_COMPILER=%s" % spec["mpi"].mpicxx,
-                    "-DCMAKE_Fortran_COMPILER=%s" % spec["mpi"].mpifc,
                 ]
             )
-
+            if "+fortran" in spec:
-        options.append(self.define_from_variant("CGNS_ENABLE_64BIT", "int64"))
+                options.append(self.define("CMAKE_Fortran_COMPILER", spec["mpi"].mpifc))
 
         if "+hdf5" in spec:
             options.extend(