This makes it possible to run xtro consistently when not all platforms are
enabled.
Fixes https://github.com/xamarin/xamarin-macios/issues/12769.
Co-authored-by: GitHub Actions Autoformatter <github-actions-autoformatter@xamarin.com>
Enabling this will ensure that future bindings (and Xcode updates that
change nullability information) are spotted right away.
The binding fixes are **not** complete, i.e. what was done was mostly
to debug the xtro rule and find corner cases. The backlog will be
_ignored_ so the builds won't fail.
Rolf Bjarne Kvinge
TJ Lambert
Sebastien Pouliot
Sebastien Pouliot