[roll] Roll cobalt-registry [networking][cobalt] Cleanup metrics

Most of the metrics recently expired. As a result, this change removes
the unused metrics. The metrics that reamin have been extended and
match those defined in the following Lapis config:

https://cs.opensource.google/fuchsia/fuchsia/+/main:src/diagnostics/config/sampler/netstack.json;l=1;drc=7aaa334504d71c369fa3f1b395189c66c99bf681
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt-registry/+/652163
Privacy-Approval: Zach Bush <zmbush@google.com>
Original-Revision: 3cf4cb53f05bcb22824ab5c95bf8649a78f9203a
GitOrigin-RevId: 922d2482b01f76183008949d1b26c2e6b1176532
Change-Id: Ib441f39864b8c8b8253bad9127788616283986bf
diff --git a/third_party/flower b/third_party/flower
index f0f073e..041bd38 100644
--- a/third_party/flower
+++ b/third_party/flower
@@ -73,7 +73,7 @@
     <project name="cobalt-registry"
              path="third_party/cobalt_config"
              remote="https://fuchsia.googlesource.com/cobalt-registry"
-             revision="c954708e4974f9c8a9ec874aec7c9c5ea217f302"
+             revision="3cf4cb53f05bcb22824ab5c95bf8649a78f9203a"
              gerrithost="https://fuchsia-review.googlesource.com"/>
     <project name="third_party/crashpad"
              path="third_party/crashpad"