#2795 [Core feature] [flytekit] Move big query writer to access storage layer directly Issue created by wild-endeavor ## Goal: What should the final outcome look like, ideally? The big query structured dataset reader currently reads from the storage client directly but the writer uses the higher level BigQuery client. This has additional cost implications. We should move the big query encoder to also use the storage layer directly. ## Misc ### Are you sure this issue hasn't been raised already? • Yes ### Have you read the Code of Conduct? • Yes flyteorg/flyte