[roll third_party/pigweed] pw_transfer: Remove/hide deprecated handle interfaces

This removes the original TransferHandle alias and requires cancellation
to happen through a transfer handle instead of the client directly.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/190972

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 83e3901fd302aa4..ed9667511654c9f
Roller-URL: https://ci.chromium.org/b/8756098488396102177
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I3ceaed9d91aaf31a53aa80157257044bd2b8ea24
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/192204
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 83e3901..ed96675 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 83e3901fd302aa46498de45d9366b67d4f3b0bd6
+Subproject commit ed9667511654c9f833d540283200e188dbb9b649