all: drop autotools build system
Summary
Removes Autotools as a way to build NM, and also replaces all uses/mentions of it with equivalent meson commands.
Purpose
As announced in the mailing list in May, we are removing Autotools and exclusively using meson for builds.
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.