Separate schemes in apinetlet into managerScheme and apinetletScheme

[balpert89]

Fixes #309

[balpert89]

@sujeet01 @Rohit-0505 https://github.com/ironcore-dev/ironcore-net/pull/310/files#diff-cd513991cc10b556eb34e9aa31ffbe2e3090219f8ff47f0688ea2e07250a2db3R665-R673 these enqueue funcs produce the following error:
2024-07-29T12:45:28Z ERROR controller-runtime.source.EventHandler kind must be registered to the Scheme {"error": "no kind is registered for the type v1alpha1.Network in scheme \"pkg/runtime/scheme.go:100\""}

The other controllers are running as expected, please have a look and fix.

@afritzler hope the styling is okay, my formatter is a bit more picky :)

[afritzler]

Thanks @balpert89 for you PR. Can we please keep the method signature and invocation in a single line as we have this code style everywhere else. Only when the parameters are going over 100 chars we typically put them on individual lines.

[balpert89]

@sujeet01 will continue from here

[balpert89]

closing this one as agreed we do not need the scheme changes and so on.