[roll] Roll third_party/pigweed 8b4ba86..d276762 (4 commits)

d276762 pw_bluetooth: Return OnceReceivers & pass by rvalue where appropriate
47b42e6 pw_bluetooth_proxy: Add max directions constant for acl connections
a07f5d9 pw_presubmit: Support query in build.bazel
c4d59ce pw_unit_test: Stop stringifying successful expectations

GitOrigin-RevId: 8a2b487e273703eada9084c7770468052466887d
Change-Id: I2430e9d3ae319889f97862396ebc41d23fa9f2e7

Author: global-integration-roller

third_party/flower

@@ -504,7 +504,7 @@
              path="third_party/pigweed/src"
              remote="https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="8b4ba86bf9f58c61d94cb19f04bd931f100d9886"/>
+             revision="d276762dff8c7b72ee81ca06c72c40553b916563"/>
     <project name="third_party/github.com/google/python_portpicker"
              gitsubmoduleof="fuchsia"
              path="third_party/python_portpicker/src"