[roll third_party/pigweed] pw_transfer: Update test server to support multiple transfers

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/95020

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 13a708b4fca2859..4f8779aa9460056
Roller-URL: https://ci.chromium.org/b/8813260625206179697
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8813260625206179697
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0553ee3e527546998bc32196c7eeca372cf6b3bc
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/95828
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>
1 file changed