[roll third_party/pigweed] pw_unit_test: Pass verbose flag to TestRunner

- Propagate the command line -v/--verbose flag to TestRunner.
- Update use of RPC client objects in sample code.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/177470

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 88335d06bf8926d..22db84fc5868737
Roller-URL: https://ci.chromium.org/b/8766343077636314497
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie55c36aef3844476b3566c0056a6b272ef635486
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/177591
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 88335d0..22db84f 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 88335d06bf8926df18cf8dd35fac3139566e5690
+Subproject commit 22db84fc5868737c55afeb1302bc1f0677b5b18e