adds runner tag support

templates/validation.yml

+spec:
+  inputs:
+    kicker-validation-job-tags:
+      description: tags to filter applicable runners for kicker-validation build job
+      type: array
+      default: []
+
+---
+
 variables:
   YAJSV_IMAGE: "registry.hub.docker.com/amux/yajsv:latest"
 
@@ -56,6 +65,7 @@ kicker-validation:
     # enabled if kicker.json file found
     - exists:
       - "kicker.json"
+  tags: $[[ input.kicker-validation-job-tags ]]
 
 kicker-extras-validation:
   extends: .json-validation