Specify try_job_retry_config for Skia try jobs

Retry config support was added to the CQ in https://chromereviews.googleplex.com/240527013/
This CL uses the retry config in Skia's cq.cfg file.

CQ's default failure_retry_weight is 1. We set it to 2 which will immediately go beyond the try job quota and will not retry for failures. It will retry for transient errors.

BUG=chromium:522460
TBR=mtklein
NOTRY=true

Review URL: https://codereview.chromium.org/1330473002

infra/branch-config/cq.cfg

@@ -45,6 +45,13 @@ verifiers {
       name: "client.skia.fyi"
       builders { name: "skia_presubmit-Trybot" }
     }
+    try_job_retry_config {
+      try_job_retry_quota: 1
+      global_retry_quota: 2
+      failure_retry_weight: 2
+      transient_failure_retry_weight: 1
+      timeout_retry_weight: 2
+    }
   }
 
   sign_cla {}