Support packages with extension modules

[hroncok]

The tool currently only supports noarch pacakges, the noarch thing is hardcoded in the template. It would be nice if it also supported packages with extension modules - those are archful and usually need at least gcc to build.

[befeleme]

Taking a look at Packaging Guidelines and some arched spec files this is needed in template.spec:

• if package is not arched, print the line BuildArch: noarch (that'd be the default)
• otherwise (set by a flag) the line wouldn't be printed to the spec file

Also, it could be possible to define ExcludeArch: and ExclusiveArch: in the config.
It's already possible to define custom BuildRequires: in addition to the generated ones.

Will it be enough to make it working?

[hroncok]

I suppose the conf2spec tool needs a way to say we don't want noarch (I would not bother with ExcludeArch: and ExclusiveArch:) and a way to say we need gcc (the option already exists).

For automated rebuilds to work, the pyp2conf tool would need to detect this and add the proper config options.

[befeleme]

Detecting the existence of extension modules naively by parsing all available wheel names: #40
A draft of PEP that would make it possible to detect that in an explicit way: https://peps.python.org/pep-0725/