[roll third_party/pigweed] pw_build: Lint & test deps in python_dist.gni templates

The pw_create_python_source_tree and pw_internal_pip_install templates
can be used as python_deps, but their lint and test subtargets do
nothing instead of forwarding to their packages. This would make it easy
to accidentally stop linting and testing a bunch of packages.

Update these templates so their subtargets forward to a pw_python_group
of their packages.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/97443

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 8f284fc0adccda3..c76cd5a7a5c37ab
Roller-URL: https://ci.chromium.org/b/8811725875604490321
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8811725875604490321
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I764edc84c66717fea760f8f12a215cd095b26272
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/97762
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 8f284fc..c76cd5a 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 8f284fc0adccda32d5270e358708d097de75754a
+Subproject commit c76cd5a7a5c37abc4f9b188be186a8260c1ac6eb