gitlab: drop the autotools jobs
Summary
As we are using too much freedesktop org resources, let's reduce them. Autotools jobs are removed and only Fedora rawhide is tested for tier1.
Purpose
Reduce the number of jobs triggered on each MR to use less resources from freedesktop.
Checklist
Please read https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/blob/main/CONTRIBUTING.md before opening the merge request. In particular, check that:
-
the subject for all commits is concise and explicative -
the message for all commits explains the reason for the change -
the source is properly formatted -
any relevant documentation is up to date -
you have added unit tests if applicable -
the NEWS file is updated when the change deserves to be mentioned, for example for new features, behavior changes, API deprecations, etc.