[roll third_party/pigweed] pw_env_setup: Fix 'pw package' regression

A recent 'pw package' change related to Upstream Only packages caused
a regression in my downstream project which, just like pigweed
upstream, can't use submodules.

While the change added a "force" mode escape hatch to enable using
affected packages downstream, it missed a use case: pw_env_setup.

This CL changes pw_env_setup to install packages in the force mode
so that they are still usable downstream.

Intentionally kept out of scope: Modifying the env_setup.json format
and parser to allow specifying force mode on a per-package basis.

Regression caused by:
https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/117834

Original-Bug: b/249829950
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/126524

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 96665e80f341cbe..4e802589eebe5a6
Roller-URL: https://ci.chromium.org/b/8791695702240648177
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5d979544d39f7bfd33373e2cc182163f404fa97e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/126436
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 96665e8..4e80258 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 96665e80f341cbee394ccfb761c39f3dd628da4e
+Subproject commit 4e802589eebe5a6912a3da9146fab24b3a01e056