[roll pigweed] pw_build: Create Python tree default pyproject file option

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/107963

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: c93a85b705d0591..fac7fe4de1373a5
Roller-URL: https://ci.chromium.org/b/8805004574381787969
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4dbc3ab223f6df1d03b23f93d708b80c3344719e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/107980
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pigweed b/pigweed
index c93a85b..fac7fe4 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit c93a85b705d0591fef4d0740c948ce43043519b3
+Subproject commit fac7fe4de1373a5617829ec2a5fa2305f2328ad4