allow 'client_name' query parameter (#57073)

Author: Ebonsignori

src/shielding/middleware/handle-invalid-query-strings.ts

@@ -45,6 +45,8 @@ const RECOGNIZED_KEYS_BY_ANY = new Set([
   'utm_campaign',
   // Used by experiments
   'feature',
+  // Used to track API requests from external sources
+  'client_name',
 ])
 
 export default function handleInvalidQuerystrings(