Various CI savings (#8291)

tests/buildkite/enforce_daily_budget.py

@@ -0,0 +1,14 @@
+import json
+import argparse
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--response", type=str, required=True)
+    args = parser.parse_args()
+    with open(args.response, "r") as f:
+        payload = f.read()
+    response = json.loads(payload)
+    if response["approved"]:
+        print(f"Testing approved. Reason: {response['reason']}")
+    else:
+        raise RuntimeError(f"Testing rejected. Reason: {response['reason']}")