[roll third_party/pigweed] pw_build: Add integration test metadata

This CL modifies the definition of existing integration tests to use
`pw_python_action_test` in order to generate appropriate metadata.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/154553

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c60df17b2c184ea..63746a714b7ee28
Roller-URL: https://ci.chromium.org/b/8773048446578222753
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4e26093933236f8706ac9a4099b2474cb2d209c4
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/165252
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index c60df17..63746a7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c60df17b2c184ea2fa95384d6c86099617ecb1c3
+Subproject commit 63746a714b7ee28c9d67ac50a8125c87b8cb23a2