chore: GenAI SDK client - only run mypy on _genai dir

PiperOrigin-RevId: 785548925

Author: sararob

vertexai/_genai/mypy.ini

@@ -3,20 +3,8 @@
 disable_error_code = import-not-found, import-untyped, arg-type
 
 # We only want to run mypy on _genai dir, ignore dependent modules
-[mypy-vertexai.agent_engines.*]
+[mypy-vertexai.*]
 ignore_errors = True
 
-[mypy-vertexai.preview.*]
-ignore_errors = True
-
-[mypy-vertexai.generative_models.*]
-ignore_errors = True
-
-[mypy-vertexai.prompts.*]
-ignore_errors = True
-
-[mypy-vertexai.tuning.*]
-ignore_errors = True
-
-[mypy-vertexai.caching.*]
-ignore_errors = True
+[mypy-vertexai._genai.*]
+ignore_errors = False