modules: Change some things for macos condition

- GLib uses internal pcre to avoid a system dependency
- We build shared-mime-info, and it depends on GLib, so GLib can't go
  after it
- PackageKit and upower don't have macOS backends
- Tools for building Glade and libsecret manpages are not present
- CA certificates are accessed through Keychain on macOS, so there is no
  path to pass to glib-networking's and librest's --with-ca-certificates
- Drop p11-glue dependency where optional; it occasionally causes
  hard-to-track-down problems
- No ALSA on macOS
- No Avahi on macOS - this also requires disabling geoclue's NMEA source

https://bugzilla.gnome.org/show_bug.cgi?id=774453