[roll third_party/pigweed] pw_protobuf: Migrate all field ID users

Migrates all pw_protobuf users from using Fields::SNAKE_CASE to
Fields::kCamelCase.

Original-Bug: b/266298474
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/126805

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 4d5321e526fabce..352fe28de3f3467
Roller-URL: https://ci.chromium.org/b/8790947260681086369
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ifbe226f14e02d610cc73f429f04fdaa98d4420c5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/126940
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 4d5321e..352fe28 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 4d5321e526fabcea4eacb80e6266d6d8a2062d30
+Subproject commit 352fe28de3f34675ed30553629590aa329d66f98