Fix macos tests #265

CMake Error at cmake/compiler_config.cmake:29 (message):
  Unsupported compiler on macOS.  Supported: AppleClang/Clang.  Found GNU.

Run export MACOSX_DEPLOYMENT_TARGET=$(sw_vers -productVersion)
/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/site-packages/wheel/bdist_wheel.py:4: FutureWarning: The 'wheel' package is no longer the canonical location of the 'bdist_wheel' command, and will be removed in a future release. Please update to setuptools v70.1 or later which contains an integrated version of this command.
  warn(
running build_ext
/Users/runner/work/MeshKernelPy/MeshKernelPy/setup.py:32: DeprecationWarning: codecs.open() is deprecated. Use open() instead.
git clone https://github.com/Deltares/MeshKernel
  with codecs.open(os.path.join(here, rel_path), "r") as fp:
Cloning into 'MeshKernel'...
git -C ./MeshKernel switch -C feature/add-contacts-testcase origin/feature/add-contacts-testcase
fatal: invalid reference: origin/feature/add-contacts-testcase
command '/usr/local/bin/git' failed with exit code 128 (Invalid reference to branch origin/feature/add-contacts-testcase). Remaining on master branch.
git -C ./MeshKernel branch
* master
cmake -S . -B build -DCMAKE_BUILD_TYPE=Release -DENABLE_UNIT_TESTING=OFF
-- The CXX compiler identification is GNU 12.5.0
-- The C compiler identification is GNU 12.5.0
-- Checking whether CXX compiler has -isysroot
-- Checking whether CXX compiler has -isysroot - yes
-- Checking whether CXX compiler supports OSX deployment target flag
-- Checking whether CXX compiler supports OSX deployment target flag - yes
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/local/bin/g++-12 - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Checking whether C compiler has -isysroot
-- Checking whether C compiler has -isysroot - yes
-- Checking whether C compiler supports OSX deployment target flag
-- Checking whether C compiler supports OSX deployment target flag - yes
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/local/bin/gcc-12 - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Error at cmake/compiler_config.cmake:29 (message):
  Unsupported compiler on macOS.  Supported: AppleClang/Clang.  Found GNU.
Call Stack (most recent call first):
  CMakeLists.txt:16 (include)

-- Configuring incomplete, errors occurred!
error: command '/usr/local/bin/cmake' failed with exit code 1
Error: Process completed with exit code 1.