[roll] Roll fuchsia [netstack3] Move SAS to netstack3_ip

Move the differentiation between IPv4 and IPv6 SAS to the IP crate
instead of integration. That allows all the different places to use a
single base implementation, which has less trait bounds.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1163882
Original-Revision: bef21fb53ace99dd2317035cb71879ff1caaaa0a
GitOrigin-RevId: c9b5da10dfc3b01656ed6c541718af0ca28425bd
Change-Id: I37ba1d29eb2f233757cbab0d445c96e046507404

Author: Bruno Dal Bo

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="7f312a0eced1ee3544fc7c6bfce1ea7fe1ce94d1"/>
+             revision="bef21fb53ace99dd2317035cb71879ff1caaaa0a"/>
   </projects>
   <hooks>
     <hook name="install-environment"