[roll third_party/pigweed] pw_env_setup: Add option to install pw packages

Add an option to install pw packages at the end of env setup.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/75580

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: af2fb1f0e4d214a..19f7a31c35fc15c
Roller-URL: https://ci.chromium.org/b/8827292483361364993
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8827292483361364993
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I91d494253be03e72775ad2d56dfb52c3a9618da2
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/75641
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 af2fb1f..19f7a31 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit af2fb1f0e4d214a91de3a3fcdd17ac61053e72cb
+Subproject commit 19f7a31c35fc15c90744e788f5c4815d42b9a61c