[iOS][infra] Make ios-simulator-noncq use chromium try recipe.

The corresponding CI builder has been migrated and the json config under
//ios has been deleted. This try builder is ready to use Chromium recipe.

Bug: 912681
Change-Id: I8bfb0ef643345ec7b2696d326b58fd1c80a89426
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2373179Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801178}

infra/config/generated/cr-buildbucket.cfg

@@ -24558,7 +24558,7 @@ buckets {
         cipd_version: "refs/heads/master"
         cmd: "recipes"
       }
-      properties: "{\"$build/goma\":{\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"},\"$kitchen\":{\"devshell\":true,\"git_auth\":true},\"mastername\":\"tryserver.chromium.mac\",\"recipe\":\"ios/try\",\"xcode_build_version\":\"12a8189h\"}"
+      properties: "{\"$build/goma\":{\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"},\"$kitchen\":{\"devshell\":true,\"git_auth\":true},\"mastername\":\"tryserver.chromium.mac\",\"recipe\":\"chromium_trybot\",\"xcode_build_version\":\"12a8189h\"}"
       execution_timeout_secs: 14400
       expiration_secs: 7200
       caches {

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

@@ -615,6 +615,7 @@ try_.chromium_mac_ios_builder(
 
 try_.chromium_mac_ios_builder(
     name = "ios-simulator-noncq",
+    executable = "recipe:chromium_trybot",
 )
 
 try_.chromium_mac_ios_builder(