[roll third_party/pigweed] pw_presubmit: Skip filtered steps when listing

Skip filtered steps when running 'pw presubmit' with
'--only-list-steps'.

LUCI uses '--only-list-steps' to expand programs so individual steps in
a program show as separate steps in MILO. This change makes it clearer
that some steps didn't actually run because there were no files for them
to run on.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/58983

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: d464911581b2fca..284b51470fe5bf2
Roller-URL: https://ci.chromium.org/b/8837365318440819441
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8837365318440819441
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ida8ab7e2f6a0882bf12720bbeeefed2f8cb26a60
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/59080
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 d464911..284b514 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit d464911581b2fcab90da60cdc33a5b123f65d699
+Subproject commit 284b51470fe5bf288b6a4e095a62acbe0d504fe9