[roll] Roll fuchsia [test_manager] Stop offering RealArchiveAccessor to system-tests

After auto-generating the privacy pipeline tests and have them be tests
backed by the inspect_test_runner, I'm not aware of any use case anymore
that requires offering the RealArchiveAccessor to tests.

If that use case comes, we can add it back.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/695685
Original-Revision: cc7bf18ad8422a4cece95bde980a5fb8b84a1413
GitOrigin-RevId: c53dd98ef7aa0efa0ed13b3d04f31f6a05a79d2c
Change-Id: I68157d257d4bbea8bf52073ddfd838d2c39b80c5
diff --git a/stem b/stem
index d9fd258..efa078e 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="f3fab0a744321cd3eae897c4230a9358e3ef8f8f"/>
+             revision="cc7bf18ad8422a4cece95bde980a5fb8b84a1413"/>
   </projects>
   <hooks>
     <hook name="install-environment"