Roll recipe dependencies (trivial).

This is an automated CL created by the recipe roller. This CL rolls
recipe changes from upstream projects (depot_tools, fuchsia, recipe_engine) into this repository.

The build that created this CL was
https://ci.chromium.org/b/8693100438918483073

depot_tools:
https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/7c837b993aba7a5efbd5ca6f00271f2df7d1e495
  7c837b9 (ovsienko@google.com)
      siso: have siso.py use env variables to start the collector.

fuchsia:
https://fuchsia.googlesource.com/infra/recipes.git/+log/6ceb00064a2d43d946ed9a1ed185364dcdae6714~..81bfa9661b97c618d1da08da3206ed208924dc02
  6ceb000 (global-integration-roller@fuchsia-infra.iam.gserviceaccount.com)
      [roll] Update pinned tools
  a88d79f (global-integration-roller@fuchsia-infra.iam.gserviceaccount.com)
      [roll] Update coverage pinned tools
  b26acdd (mohrr@google.com)
      [git_roll_util] Retry change number lookups
  889202b (mohrr@google.com)
      [gerrit] Support more cases in host_basename()
  a893c53 (mohrr@google.com)
      [bisector] Don't retry gitiles queries repeatedly
  81bfa96 (chandarren@google.com)
      [bazel_btu] Allow project to be a subdir...

recipe_engine:
https://chromium.googlesource.com/infra/luci/recipes-py.git/+/45727a04348d66d39f815d2901c9162f875fbcae
  45727a0 (gbeaty@chromium.org)
      Update the proto import script with info for build protos

Please check the following references for more information:
- autoroller, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/workflow.md#autoroller
- rollback, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/workflow.md#rollback
- cross-repo dependencies, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/cross_repo.md

Use https://goo.gl/noib3a to file a bug.

R=flutter-infra-notify+luci-recipes@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Ignore-Freeze: Autoroller
Bugdroid-Send-Email: False
Change-Id: Ifc489081995350044828dbb8bae6b3e038b51d8d
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/73960
Commit-Queue: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>