Disable network in initrd and disable selinux

[davidcassany]

This PR includes three independent changes (and a commit for each):

1. Disables enforce mode for SELINUX. Dbus service in green example started to fail due to some SELINUX denials. Until this is fixed and further analyzed we switch to permissive mode.
2. Fixes the recovery tests, we realized they were not testing the right system, upgrading recovery was performed from a downgraded system as a result of the previous test.
3. Disables network setup in initrd. This turned to be buggy lately, despite not causing an explicit failure it causes the system to be stuck for around 90s at boot (probably related to this issue: dbus in the initrd just like this is a bad idea dracutdevs/dracut#2378 ), this can be seen on CI tests timing, as suddenly tests started to last way longer, compare the timing in this run and this other one without NM in initrd.

All of them are currenltye required to turn the CI back to green with the expected performance.