[roll third_party/pigweed] pw_status: Remove non-canonical InvalidSignature()

Removes the "InvalidSignature" status code added by an earlier change.
We can not add or change status codes defined in status.h as they match
the standard code defined in Abseil, gRPC etc. Errors should be mapped
to the closest approximation as described in this file. This change
chooses "Unauthenticated" to replace "InvalidSignature".

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57580

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 4dda54715b8e015..5e619a25fd3ffb8
Roller-URL: https://ci.chromium.org/b/8838533934110024465
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838533934110024465
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If44867058e3aad1085e9e11280c09128b087752f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/57583
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 4dda547..5e619a2 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 4dda54715b8e01540c0fec758b77acc16ed17061
+Subproject commit 5e619a25fd3ffb85eca420925ad16a312811ff16