(#1875) add lifecycle json file for TTL on hearings mp4 files (#2040)

* add lifecycle json

* formatting fix from prettier

Author: ACoullard

infra/gcs-lifecycle/lifecycle.json

@@ -0,0 +1,8 @@
+{
+  "rule": [
+    {
+      "action": { "type": "Delete" },
+      "condition": { "age": 1, "matchesPrefix": ["hearing-"] }
+    }
+  ]
+}