[roll third_party/pigweed] pw_presubmit: Simplify adding only pylint and mypy

Simplify adding only the pylint and mypy checks to downstream projects
and not adding test_python_packages.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/55982

third_party/pigweed Rolled-Commits: 518f7c16df0b68c..6499688f79fbf43
Roller-URL: https://ci.chromium.org/b/8839879480835061808
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8839879480835061808
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iea3b6d71d0ee27d081a6818250306f6c0b51bbce
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/55984
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 518f7c1..6499688 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 518f7c16df0b68cc68cb8821ec3e234f45a2ee4c
+Subproject commit 6499688f79fbf432f5890a2e6fcb6333c9f379d6