infra: add -p to mkdir in lint steps (#17013)

Previously, if this did not find a mypy cache then it wouldnt run

this makes it always run

adding mypy ignore comments with existing uncaught issues to unblock other prs

---------

Co-authored-by: Erick Friis <erick@langchain.dev>
Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>

libs/community/langchain_community/llms/pipelineai.py

@@ -102,7 +102,7 @@ class PipelineAI(LLM, BaseModel):
                 "Could not import pipeline-ai python package. "
                 "Please install it with `pip install pipeline-ai`."
             )
-        client = PipelineCloud(token=self.pipeline_api_key.get_secret_value())
+        client = PipelineCloud(token=self.pipeline_api_key.get_secret_value())  # type: ignore[union-attr]
         params = self.pipeline_kwargs or {}
         params = {**params, **kwargs}