[roll third_party/pigweed] pw_persistent_memory: reset() -> invalidate()

Renames reset() to Invalidate(), as it better expresses that the
resulting object will be considered invalid after calling.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/41341

third_party/pigweed Rolled-Commits: 5f53d27f84e1519..1b2a14059fd11e8
Roller-URL: https://ci.chromium.org/b/8845314692515107920
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8845314692515107920
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic10155c341ad5b595b908f0f54ada1a9f2d2bada
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/47921
Reviewed-by: 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 5f53d27..1b2a140 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5f53d27f84e151969015f7fa91b5516c3e8582e8
+Subproject commit 1b2a14059fd11e8228e828b307dbdcce4a532e9d