[fuchsia] Add host chromedriver build and CIPD package.

* Add the host chromedriver binary as part of the Fuchsia build.
* Add a CIPD package to upload a stripped chromedriver binary.

Bug: IN-1321 (Fuchsia internal)
Change-Id: Ia414914304ede7a54ff097365bb72cba6674e5ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1719377
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Auto-Submit: Fabrice de Gans-Riberi <fdegans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682114}

diff --git a/BUILD.gn b/BUILD.gn
index 19fd588..9799353 100644
--- a/BUILD.gn
+++ b/BUILD.gn

@@ -545,6 +545,10 @@
     }
   }
 
+  if (is_fuchsia) {
+    deps += [ "//chrome/test/chromedriver:chromedriver($host_toolchain)" ]
+  }
+
   if (is_android || (is_linux && !is_chromeos)) {
     deps += [
       "//components/network_hints/browser",