use pytest-xdist to utilize multiple workers for Python tests - #6696

__________________________ test_color_tty[env0-True] ___________________________
[gw3] darwin -- Python 3.12.5 /usr/local/bin/python3

tmpdir = local('/private/var/folders/3p/1bg9mx4130dgqr_85c65ptwh0000gn/T/pytest-of-runner/pytest-1/popen-gw3/test_color_tty_env0_True_0')
env = {}, color_expected = True

    @pytest.mark.skipif(sys.platform == "win32", reason="TTY not supported in Windows")
    @pytest.mark.parametrize("env,color_expected", [({}, True), ({"NO_COLOR": "1"}, False)])
    def test_color_tty(tmpdir, env, color_expected):
        test_file = os.path.join(tmpdir, 'test.c')
        with open(test_file, 'wt') as f:
            f.write('#error test\nx=1;\n')
        exitcode, _, stderr = cppcheck([test_file], env=env, tty=True)
    
        assert exitcode == 0
>       assert stderr
E       AssertionError: assert ''

other_test.py:119: AssertionError
----------------------------- Captured stdout call -----------------------------
using '/Users/runner/work/cppcheck/cppcheck/cppcheck'
=========================== short test summary info ============================
FAILED other_test.py::test_color_tty[env0-True] - AssertionError: assert ''

__________________________ test_addon_absolute_path ___________________________
[gw0] win32 -- Python 3.13.0 C:\hostedtoolcache\windows\Python\3.13.0\x64\python.exe

    def test_addon_absolute_path():
        args = [
            '--addon=misra',
            '--enable=style',
            '--template=cppcheck1',
            __proj_dir
        ]
        ret, stdout, stderr = cppcheck(args)
        filename = os.path.join(__proj_dir, 'main.c')
        assert ret == 0, stdout
>       assert stderr == ('[%s:5]: (error) Division by zero.\n'
                          '[%s:1]: (style) misra violation (use --rule-texts=<file> to get proper output)\n' % (filename, filename))
E       AssertionError: assert '[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:5]: (error) Division by zero.\n[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:1]: (style) misra violation (use --rule-texts=<file> to get proper output)\n[C:\\Users\\runneradmin\\AppData\\Local\\Temp\\pytest-of-runneradmin\\pytest-1\\popen-gw1\\test_addon_misra0\\test.cpp:2]: (style) misra violation (use --rule-texts=<file> to get proper output)\n' == '[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:5]: (error) Division by zero.\n[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:1]: (style) misra violation (use --rule-texts=<file> to get proper output)\n'
E         
E           [D:\a\cppcheck\cppcheck\test\cli\helloworld\main.c:5]: (error) Division by zero.
E           [D:\a\cppcheck\cppcheck\test\cli\helloworld\main.c:1]: (style) misra violation (use --rule-texts=<file> to get proper output)
E         + [C:\Users\runneradmin\AppData\Local\Temp\pytest-of-runneradmin\pytest-1\popen-gw1\test_addon_misra0\test.cpp:2]: (style) misra violation (use --rule-texts=<file> to get proper output)

test\cli\helloworld_test.py:93: AssertionError
---------------------------- Captured stdout call -----------------------------
using 'D:\a\cppcheck\cppcheck\cppcheck.exe'
______________________________ test_addon_misra _______________________________
[gw1] win32 -- Python 3.13.0 C:\hostedtoolcache\windows\Python\3.13.0\x64\python.exe

tmpdir = local('C:\\Users\\runneradmin\\AppData\\Local\\Temp\\pytest-of-runneradmin\\pytest-1\\popen-gw1\\test_addon_misra0')

    def test_addon_misra(tmpdir):
        test_file = os.path.join(tmpdir, 'test.cpp')
        with open(test_file, 'wt') as f:
            f.write("""
    typedef int MISRA_5_6_VIOLATION;
            """)
    
        args = ['--addon=misra', '--enable=all', '--disable=unusedFunction', '-j1', test_file]
    
        exitcode, stdout, stderr = cppcheck(args)
>       assert exitcode == 0
E       assert 1 == 0

test\cli\other_test.py:284: AssertionError
---------------------------- Captured stdout call -----------------------------
using 'D:\a\cppcheck\cppcheck\cppcheck.exe'
=========================== short test summary info ===========================
FAILED test/cli/helloworld_test.py::test_addon_absolute_path - AssertionError: assert '[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:5]: (error) Division by zero.\n[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:1]: (style) misra violation (use --rule-texts=<file> to get proper output)\n[C:\\Users\\runneradmin\\AppData\\Local\\Temp\\pytest-of-runneradmin\\pytest-1\\popen-gw1\\test_addon_misra0\\test.cpp:2]: (style) misra violation (use --rule-texts=<file> to get proper output)\n' == '[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:5]: (error) Division by zero.\n[D:\\a\\cppcheck\\cppcheck\\test\\cli\\helloworld\\main.c:1]: (style) misra violation (use --rule-texts=<file> to get proper output)\n'
  
    [D:\a\cppcheck\cppcheck\test\cli\helloworld\main.c:5]: (error) Division by zero.
    [D:\a\cppcheck\cppcheck\test\cli\helloworld\main.c:1]: (style) misra violation (use --rule-texts=<file> to get proper output)
  + [C:\Users\runneradmin\AppData\Local\Temp\pytest-of-runneradmin\pytest-1\popen-gw1\test_addon_misra0\test.cpp:2]: (style) misra violation (use --rule-texts=<file> to get proper output)
FAILED test/cli/other_test.py::test_addon_misra - assert 1 == 0

_______________________________ test_addon_misra _______________________________
[gw1] linux -- Python 3.8.10 /usr/bin/python3

tmpdir = local('/tmp/pytest-of-runner/pytest-0/popen-gw1/test_addon_misra0')

    def test_addon_misra(tmpdir):
        test_file = os.path.join(tmpdir, 'test.cpp')
        with open(test_file, 'wt') as f:
            f.write("""
    typedef int MISRA_5_6_VIOLATION;
            """)
    
        args = ['--addon=misra', '--enable=all', '--disable=unusedFunction', '-j1', test_file]
    
        exitcode, stdout, stderr = cppcheck(args)
>       assert exitcode == 0
E       assert -6 == 0

test/cli/other_test.py:284: AssertionError
----------------------------- Captured stdout call -----------------------------
using '/home/runner/work/cppcheck/cppcheck/cppcheck'
=========================== short test summary info ============================
FAILED test/cli/other_test.py::test_addon_misra - assert -6 == 0