Add infra_tests.py, recipe, buildbotless bot

infra/bots/recipes/swarm_infra.expected/infra_tests.json

Index: infra/bots/recipes/swarm_infra.expected/infra_tests.json
diff --git a/infra/bots/recipes/swarm_presubmit.expected/presubmit.json b/infra/bots/recipes/swarm_infra.expected/infra_tests.json
similarity index 93%
copy from infra/bots/recipes/swarm_presubmit.expected/presubmit.json
copy to infra/bots/recipes/swarm_infra.expected/infra_tests.json
index 5e88fc3353e72a73e7de1800801b9a1897be54dd..161e230deca0e52e322903d249c814752583aeb0 100644
--- a/infra/bots/recipes/swarm_presubmit.expected/presubmit.json
+++ b/infra/bots/recipes/swarm_infra.expected/infra_tests.json
@@ -121,25 +121,26 @@
   },
   {
     "cmd": [
-      "git",
-      "status"
+      "go",
+      "get",
+      "-u",
+      "go.skia.org/infra/..."
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
-    "name": "git status"
+    "env": {
+      "GOPATH": "[CUSTOM_/_B_WORK]/gopath"
+    },
+    "name": "update_go_pkgs"
   },
   {
     "cmd": [
-      "RECIPE_PACKAGE_REPO[depot_tools]/presubmit_support.py",
-      "--commit",
-      "--upstream=HEAD^",
-      "-v",
-      "-v"
+      "python",
+      "[CUSTOM_/_B_WORK]/skia/infra/bots/infra_tests.py"
     ],
     "cwd": "[CUSTOM_/_B_WORK]/skia",
     "env": {
-      "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:%(PATH)s"
+      "GOPATH": "[CUSTOM_/_B_WORK]/gopath"
     },
-    "name": "presubmit"
+    "name": "infra_tests"
   },
   {
     "name": "$result",