[roll third_party/pigweed] pw_i2c: use timeout instead of for_at_least

The signatures and comments are updated to reflect the most recent
terminology for describing blocking APIs with timeouts.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/60041

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 5ff8cc5b2bb5bcd..64496a454367124
Roller-URL: https://ci.chromium.org/b/8836643191015545473
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8836643191015545473
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie0d128a15e63ffd74ed7393d462f9ccedbffd283
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/60122
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 5ff8cc5..64496a4 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5ff8cc5b2bb5bcdfd986d2acbca349243d0d3f2d
+Subproject commit 64496a454367124e46f716595eeb1af046a8c725