[roll third_party/pigweed] pw_rpc: Temporary RPC client workaround

Provide option in the Python client that disables cancellation of
duplicate RPC calls. This is a temporary workaround that will be
removed.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57420

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: bf0ff834cf9a186..94d45789c7ab7ea
Roller-URL: https://ci.chromium.org/b/8838627649073153552
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838627649073153552
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I32b282937161b7a539d558607b6f00f1a0fc6d0c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/57480
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 bf0ff83..94d4578 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit bf0ff834cf9a18656571b31bbc2c2f98389997e0
+Subproject commit 94d45789c7ab7eac7e34aedd092b1715c3463529