roll: pigweed Revert "pw_system: Don't use implementation_deps"

This reverts commit 65c56255b82a13cc2b521b12cedf165b696261b5.

Reason for revert: Implementation deps now supported internally.

Original change's description:
> pw_system: Don't use implementation_deps
>
> This is just a temporary mitigation for a lack of support for
> implementation_deps internally. I hope to revert this within weeks.
>
> Original-Bug: 304374970
> Original-Bug: 356667663
> Change-Id: I16cc22c36960cb53676591709f5402f2a8032370
> Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/226977
> Pigweed-Auto-Submit: Ted Pudlik <tpudlik@google.com>
> Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
> Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
> Reviewed-by: Armando Montanez <amontanez@google.com>

# Not skipping CQ checks because original CL landed > 1 day ago.

Original-Bug: 304374970
Original-Bug: 356667663
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/227601
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 29fc404197899dd272320c336f944b91e2140f09

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 35c10c46e5761f..29fc404197899d
Roller-URL: https://ci.chromium.org/b/8734712641826069185
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I24225f7291bf1747615acf97bc8f887c3fd5f898
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/240636
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/MODULE.bazel b/MODULE.bazel
index 549ea88..4b1c59d 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -49,8 +49,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-10-07.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8734715619614546993.
-    commit = "35c10c46e5761fc133e68d1df96596f12d59b54d",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8734712641826069185.
+    commit = "29fc404197899dd272320c336f944b91e2140f09",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -58,8 +58,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-10-07.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8734715619614546993.
-    commit = "35c10c46e5761fc133e68d1df96596f12d59b54d",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8734712641826069185.
+    commit = "29fc404197899dd272320c336f944b91e2140f09",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )