Reduce timeout for 'Libfuzzer Upload Linux UBSan'.

Bug: 1106029
Change-Id: Ice3f5575963ba0f31faf3cd45411c2b6c89589ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2302740
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Commit-Queue: Michael Moss <mmoss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789166}

infra/config/generated/cr-buildbucket.cfg

@@ -3154,7 +3154,7 @@ buckets {
         cmd: "recipes"
       }
       properties: "{\"$build/goma\":{\"enable_ats\":true,\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"},\"$kitchen\":{\"devshell\":true,\"git_auth\":true},\"mastername\":\"chromium.fuzz\",\"recipe\":\"chromium_libfuzzer\"}"
-      execution_timeout_secs: 18000
+      execution_timeout_secs: 12600
       build_numbers: YES
       service_account: "chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
       resultdb {

infra/config/subprojects/chromium/master-only/ci.star

@@ -1266,9 +1266,7 @@ ci.fuzz_libfuzzer_builder(
         category = 'libfuzz',
         short_name = 'linux-ubsan',
     ),
-    # TODO(https://crbug.com/1106029) Use default timeout once goma outage is
-    # over
-    execution_timeout = 5 * time.hour,
+    execution_timeout = 3 * time.hour + 30 * time.minute,
     triggering_policy = scheduler.greedy_batching(
         max_concurrent_invocations = 5,
     ),