roll: third_party/pigweed pw_config_loader: Move find_config.py

Moves find_config.py from pw_cli to pw_config_loader, which is a more
appropriate home for it.

Original-Bug: b/399204950
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/274752
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 5fdadebaf51bb6659e76fc1dd7a2823c70877195

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 8b126082b9df0b..5fdadebaf51bb6
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8720609855094523425
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I278986c09eb9983f0d06172a91b274c576cf0141
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/kudzu/+/274958
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 8b12608..5fdadeb 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 8b126082b9df0bffd0b50a1e61e515430a6f0d68
+Subproject commit 5fdadebaf51bb6659e76fc1dd7a2823c70877195