fix: get node info from a PXE (#10420)

The CLI changed or something. 

We now need to use a PXE url, and specify an empty string for node-url.

I filed #10419

spartan/aztec-network/files/config/config-validator-env.sh

@@ -1,9 +1,9 @@
 #!/bin/bash
 set -eu
 
-# Pass the bootnode url as an argument
-# Ask the bootnode for l1 contract addresses
-output=$(node --no-warnings /usr/src/yarn-project/aztec/dest/bin/index.js get-node-info --node-url $1)
+# Pass a PXE url as an argument
+# Ask the PXE's node for l1 contract addresses
+output=$(node --no-warnings /usr/src/yarn-project/aztec/dest/bin/index.js get-node-info -u $1 --node-url '')
 
 echo "$output"