[third_party/pigweed] Roll 24 commits

b4e82abda1f7785 pw_multibuf: Make HeaderChunkRegionTracket public
a5da9446fb2c7f6 pw_unit_test: Skip googletest tests if not set
5a521cb4f24cfd6 docs: Gerrit code coverage documentation
db39d89da115738 docs: Move copyright header info to style guide
7afbb205c205659 pw_allocator: Fix use-after-free in ~AllocatorForT
8750debc3c31d37 pw_presubmit: Fix TestTodoCheck.test_one_bug_legac
b8323b6b9334bd4 pw_presubmit: No coverage upload for shadow builds
58cbff1b65f10d7 pw_presubmit: Remove some unused constants
f920a129cf3ed4f docs: Document the Test footer
826cb8013ecc41c pw_toolchain_bazel: Add LLVM clang tool template
0d40b578a642b05 pw_toolchain_bazel: Add ARM GCC toolchain template
c5270f6aeecb805 pw_presubmit: Add is_shadow/is_prod members to con
7e4cbf3a3ef1f43 pw_presubmit: Refactor the coverage options
4209e8f954d189c pw_allocator: Add AllocationTestHarness
e395d6a6991032f pw_toolchain_bazel: Support featureless sysroots
b1818e9c2404c3e pw_multibuf: Fix cmake build file
b7d686c7f47afe1 pw_presubmit: Show diffs when parser tests fail
559d3789342d9ff pw_format: Add core::fmt macro helper
f2d2129612c13a9 pw_bluetooth_sapphire: Add testonly to testing tar
2a06e1549e6d7ea pw_presubmit: Trim paths in Bazel summaries
770c57d44c0ae84 pw_bluetooth_sapphire: Revert commits to get to a
7dde8e8f4926d8d pw_allocator: Add AllocationTestHarness
44287c6af439945 pw_containers: Warn about unsafe Vector usage
d4ede194c4969ea Revert "pw_transfer: Set clients to transfer_v2"

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 77b826167ba5e92..b4e82abda1f7785
Roller-URL: https://ci.chromium.org/b/8763013044452759457
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I26d99602596d0baf1a654575f28115f9ab8b9d19
Reviewed-on: https://pigweed-review.googlesource.com/c/gonk/+/183124
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 77b8261..b4e82ab 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 77b826167ba5e92704dedecab448df386227a9ef
+Subproject commit b4e82abda1f7785907e08c84bad1a6e90e8a50f8