[roll] Roll fuchsia [diagnostics][cleanup] Use fuchsia::test everywhere

This ensures we won't miss logs from the code called by the tests.

The only remaining place where I couldn't get this to work was in
macros:
- integration_test (triage integration.rs)
- proptests in log-stats

A few tests were emitting expected error logs and hence causing
failures. The BUILD.gn rules for the packages where those were
now ignore ERROR logs.

Tested: existing tests

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/599487
Original-Revision: 8e8a3c58d89d2f5f86bd95fd90c6df57ef378f19
GitOrigin-RevId: d8fd58a7d6f026839b901186d0efbe6ce26b6e92
Change-Id: I54d342a6dfcccadfa726f75bf2365f998f1ac346
diff --git a/stem b/stem
index f77d857..d51cd67 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="d09404dfb68faf240a6b8383b6be4aadd7509fe8"/>
+             revision="8e8a3c58d89d2f5f86bd95fd90c6df57ef378f19"/>
   </projects>
   <hooks>
     <hook name="install-environment"