murano-pkg-check fails to build with mock > 4.0.0

[Joel Capitao]

While rebuilding python-murano-pkg-check 0.3.0 on Fedora rawhide, we're hitting the issue below.

python3-mock-4.0.3-4.fc37.noarch

I suspect it's due to mock > 4.0.0

======================================================================
FAIL: muranopkgcheck.tests.test_manager.ManagerTest.test_validate
tags: worker-6
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/mock/mock.py", line 1343, in patched
    with self.decoration_helper(patched,
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/contextlib.py", line 137, in __enter__
    return next(self.gen)
           ^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mock/mock.py", line 1325, in decoration_helper
    arg = exit_stack.enter_context(patching)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/contextlib.py", line 502, in enter_context
    result = _enter(cm)
             ^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mock/mock.py", line 1437, in __enter__
    if spec is None and _is_async_obj(original):
                        ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mock/mock.py", line 52, in _is_async_obj
    if hasattr(obj, '__func__'):
       ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/builddir/build/BUILD/murano-pkg-check-0.3.0/muranopkgcheck/error.py", line 67, in __getattr__
    raise ValueError(_LE('Error {} was not registered').format(code))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: Error __func__ was not registered
Ran 151 tests in 10.566s

[Joel Capitao (jcapitao)]

We had to cherry-pick some patches on top 0.3.0 tag [1]

https://src.fedoraproject.org/rpms/python-murano-pkg-check/c/9ee0a3dda8b1216ecea19899f52e4128ce3e8883?branch=rawhide

[Joel Capitao (jcapitao)]

The commit that fixes the issue: https://review.opendev.org/c/openstack/murano-pkg-check/+/739921