ci(macOS): brew prefix

On intel macOS, brew installs into /usr/local
On apple silicon, brew installs into /opt/homebrew

Use brew --prefix to resolve the right brew prefix in a platform independent manor

.github/workflows/Build_and_Run_Standalone_Test.yml

@@ -42,10 +42,10 @@ jobs:
         elif [ ${{ runner.os }} == 'macOS' ]
         then
           brew install netcdf netcdf-cxx netcdf-fortran
-          echo "LIBRARY_PATH=/usr/local/lib/:$LIBRARY_PATH" >> $GITHUB_ENV
-          echo "LDFLAGS=-L/usr/local/lib" >> $GITHUB_ENV
-          echo "INCLUDE=/usr/local/include" >> $GITHUB_ENV
-          echo "NETCDF=/usr/local" >> $GITHUB_ENV
+          echo "LIBRARY_PATH=$(brew --prefix)/lib/:$LIBRARY_PATH" >> $GITHUB_ENV
+          echo "LDFLAGS=-L$(brew --prefix)/lib" >> $GITHUB_ENV
+          echo "INCLUDE=$(brew --prefix)/include" >> $GITHUB_ENV
+          echo "NETCDF=$(brew --prefix)" >> $GITHUB_ENV
         fi
     
     # Build and run noah executable