[roll third_party/pigweed] bazel: Missing Python rules

- Update com_google_protobuf to 3.17.3, allows proto3 compiling.
- Use filegroup for common Python sources in pw_protobuf and rpc
- Add pw_cli py_tests

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57720

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 637b773dccf3927..d63bd748ebc9bc0
Roller-URL: https://ci.chromium.org/b/8837258678744120817
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8837258678744120817
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I17c15ac9710fad2e2c6c7150370d971c746d6400
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/59400
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 637b773..d63bd74 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 637b773dccf39275a6e9df9bd8dcc4d3598f3ce2
+Subproject commit d63bd748ebc9bc0cf7cde78b831f8fb9b18840a6