third_party/fuchsia: Add fit::result to the Fuchsia Copybara script
third_party/fuchsia: Add fit::result to the Fuchsia Copybara script

Bug: b/250918633
Change-Id: I0318e4f4700bb0afc6a36238545e730c2ac4e08a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/114096
Commit-Queue: Auto-Submit <14637eda5603879df170705285bf30f5996692f0@pigweed.google.com.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Wyatt Hepler <cca3bedb37979eacd157a9bceb473582df8aea1e@google.com>
Reviewed-by: Ben Lawson <1643bc2e13f27e018f57114b08bbfaad1c6730d3@google.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed