[roll third_party/pigweed] pw_build: pw_python_wheels output directory

- Support a `directory` argument in the pw_python_wheels template that
  specifies the output directory to use.
- Include the target name in the default output directory in case there
  are multiple pw_python_wheels targets in one BUILD.gn.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/70760

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 5e3cf38a468819d..2b454658f56a49c
Roller-URL: https://ci.chromium.org/b/8829657063102222081
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8829657063102222081
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I27e897938e8a140a56dad80526d99acf35870271
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/70781
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 5e3cf38..2b45465 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5e3cf38a468819dc662b31d2d19c5560b1081468
+Subproject commit 2b454658f56a49c52602a1e58ab7f0715d34ef64