[roll third_party/pigweed] pw_presubmit: Add cfg+toml to sources build check

Add missing setup.cfg and pyproject.toml files to pw_python_package.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57866

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: f15b206f3330a8a..7f8941f1ebcabac
Roller-URL: https://ci.chromium.org/b/8837984413161980785
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8837984413161980785
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ib652a78f8c855423467fa2d3417b179dd499488e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/58181
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 f15b206..7f8941f 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f15b206f3330a8adebf987098c828b534a6f9c5b
+Subproject commit 7f8941f1ebcabaccab687df3becca44226ac9d70