Fix broken print in ccdk (airbytehq#34578)

Author: maxi297

airbyte-cdk/python/airbyte_cdk/entrypoint.py

@@ -212,7 +212,9 @@ def launch(source: Source, args: List[str]) -> None:
     source_entrypoint = AirbyteEntrypoint(source)
     parsed_args = source_entrypoint.parse_args(args)
     for message in source_entrypoint.run(parsed_args):
-        print(message)
+        # simply printing is creating issues for concurrent CDK as Python uses different two instructions to print: one for the message and
+        # the other for the break line. Adding `\n` to the message ensure that both are printed at the same time
+        print(f"{message}\n", end="")
 
 
 def _init_internal_request_filter() -> None: