- remove unnecessary dependency on async_generator

* Prevent DeprecationWarning to bubble up on CPython 3.10.9 and 3.11.1. #460
- Inject multibuild to defeat a build loop
- Initial release of python-pytest-asyncio 0.8.0

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:pytest/python-pytest-asyncio?expand=0&rev=34

python-pytest-asyncio.spec

@@ -47,7 +47,6 @@ Requires:       python-typing-extensions >= 3.7.2
 %endif
 BuildArch:      noarch
 %if %{with test}
-BuildRequires:  %{python_module async_generator >= 1.3}
 BuildRequires:  %{python_module flaky >= 3.5.0}
 BuildRequires:  %{python_module hypothesis >= 5.7.1}
 BuildRequires:  %{python_module pytest >= 7.0.0}