google-cloud-sdk: add numpy dependency for IAP performances. (#206105)

For more information see:
https://cloud.google.com/iap/docs/using-tcp-forwarding#increasing_the_tcp_upload_bandwidth

pkgs/tools/admin/google-cloud-sdk/default.nix

@@ -15,6 +15,7 @@ let
     cryptography
     openssl
     crcmod
+    numpy
   ] ++ lib.optional (with-gce) google-compute-engine);
 
   data = import ./data.nix { };