Disable `chromium.resultdb.result_sink` experiment on all chromium fyi builders

Bug: 1108016
Change-Id: I8988641e2db1cadd3c35898a504c804d4dc4cf5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2453372Reviewed-by: Nodir Turakulov <nodir@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Chan Li <chanli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814541}

infra/config/lib/ci.star

@@ -695,7 +695,7 @@ def fyi_builder(
         # TODO(crbug.com/1108016): Move this kwarg to ci.builder(), after
         # ResultSink and result_adapter is confirmed to work.
         experiments = {
-            "chromium.resultdb.result_sink": 30,
+            "chromium.resultdb.result_sink": 0,
         },
         **kwargs
     )