roll: third_party/pigweed pw_toolchain: C++23 support and presubmit build

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/354272
Original-Revision: 209942ef971120efc8a413d2e436e01414943d45

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 04b85752d08c0c..209942ef971120
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8691543952909135425
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1e0e4ea704dba42959c6bde73279c1d67cfe7b18
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/368572
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.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 04b8575..209942e 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 04b85752d08c0c1f4fa010ae71d618ff9130eaa9
+Subproject commit 209942ef971120efc8a413d2e436e01414943d45