"wireless-tools-devel" is long depreacted and not used by
NetworkManager, not even for WEXT.

Drop it from the build dependencies.

REQUIRED_PACKAGES has two uses:

 - to setup a system for developing NetworkManager. This installs
   convenience packages like "cscope".

 - to install the packages required for unit testing in gitlab-ci.

For gitlab-ci we should only install the packages that we actually
need.

Previously, dnf/yum used to ignore packages that didn't exist.
In Fedora 32, dnf starts to fail the entire command:

  No match for argument: python-gobject-base
  Error: Unable to find a match: python-gobject-base

Since this script is supposed to work with different RHEL/Fedora
versions, it's expected that not all packages are available everywhere.

Fix that, by installing packages that we know that they might be missing
one by one (and ignore the error).

"NetworkManager-wifi" package requires either wpa_supplicant or iwd.
When installing the package without explicitly installing supplicant
or iwd (and not having it installed yet), then we want to drag in
wpa_supplicant by default. That is accomplished by suggesting wpa_supplicant
package.

Otherwise, the user installing NetworkManager-wifi might get iwd,
which is only functioning if the user explicitly enables the backend
in "NetworkManager.conf".

https://bugzilla.redhat.com/show_bug.cgi?id=1743585

This allows the GSM connection to Just Work most of the time, as in:
"nmcli d connect ttyUSB0".