fix(ci) Use PrestoC++ license check script for protocol

The protocol generation used the Velox
license check script to remove the license headers
from special files. But presto-native-execution
has its own license check that should be used.
This decouples PrestoC++ and Velox.

Author: czentgr

presto-native-execution/presto_cpp/presto_protocol/java-to-struct-json.py

@@ -169,7 +169,7 @@ def member_name(name):
 def special(filepath, current_class, key, classes, depends):
     classes[current_class].class_name = current_class
     (status, stdout, stderr) = classes[current_class][key] = util.run(
-        "../../velox/scripts/checks/license-header.py --header ../../license.header --remove "
+        "../../scripts/license-header.py --header ../../license.header --remove "
         + filepath
     )
     classes[current_class][key] = stdout