[roll third_party/pigweed] build: Disable integration tests unless on Linux

Some macOS systems are not able to run integration tests due to issues
creating ports. Disable integration tests unless on Linux with the GN
arg pw_RUN_INTEGRATION_TESTS. In presubmit, though, only disable
integration tests on Windows.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/59143

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 211dce4c94f74b4..f973e861a224b23
Roller-URL: https://ci.chromium.org/b/8837324586998328849
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8837324586998328849
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I3057ad61431cf1fd65c4a1a5290a26aa8bff133a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/59103
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 211dce4..f973e86 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 211dce4c94f74b43e942e1d461bc0e4f9df1b2ee
+Subproject commit f973e861a224b2395c5f04988766763f4512b292