[th/in-container-inplace] add script for configuring NetworkManager like RPM builds do

Add a script to run ./configure/meson with similar arguments as if you do an rpm build.

The point is, that a subsequent make install will overwrite the installed NetworkManager from the system.

Usually you would not want to do that on your machine, however, it will be useful with the contrib/scripts/nm-in-container.sh script. This allows you to very fast build, install and run a new NetworkManager version. The important part is that this way, the installed NetworkManager can run as a systemd service!