➖ Remove pytest-forked

Problem:
- pytest-forked (https://pypi.org/project/pytest-forked/) is basically orphaned
  and unmaintained. Instead,
  pytest-xdist (https://pypi.org/project/pytest-xdist/) provides the ability to
  spread tests across CPUs.

Solution:
- Replace pytest-forked with pytest-xdist

Author: elbeno

.github/workflows/test.yml

@@ -56,8 +56,7 @@ jobs:
       - name: Install python quality tools
         run: |
           pipx install pytest
-          pipx inject pytest pytest-forked
-          pipx inject pytest hypothesis
+          pipx inject pytest pytest-xdist hypothesis
           pipx install mypy
           pipx install black
           echo "/opt/pipx_bin" >> $GITHUB_PATH

cmake/test.cmake

@@ -245,8 +245,8 @@ function(add_python_test_target name)
         set(include_dirs_arg --include_dirs ${include_dirs})
     endif()
     set(target_test_command
-        env "PYTHONPYCACHEPREFIX=${CMAKE_BINARY_DIR}/__pycache__" pytest
-        --forked -o "cache_dir=${CMAKE_BINARY_DIR}/.pytest_cache"
+        env "PYTHONPYCACHEPREFIX=${CMAKE_BINARY_DIR}/__pycache__" pytest -n
+        auto -o "cache_dir=${CMAKE_BINARY_DIR}/.pytest_cache"
         --rootdir=${CMAKE_SOURCE_DIR} -s ${UNIT_FILES} ${include_files_arg}
         ${include_dirs_arg} ${UNIT_EXTRA_ARGS})