codecov CI: pin pip and setuptools versions to sort out different build files location issue (#422)

Author: slayoo

.github/workflows/codecov.yml

@@ -17,6 +17,7 @@ jobs:
       - run: sudo apt install -y lcov
       - run: |
           set -xe
+          pip install "pip<23" setuptools==65.2
           CMAKE_ARGS="-DCMAKE_CXX_FLAGS=--coverage -DCMAKE_C_FLAGS=--coverage -DCMAKE_Fortran_FLAGS=--coverage" pip install -e .[tests]
           pytest -We tests
           lcov --capture --directory ./build/*/_PyPartMC/CMakeFiles/_PyPartMC.dir/ --output-file coverage.info --no-external