Remove dependency of spanner_dbapi from spanner_v1 [Description] - spanner_v1 database.get_batch_transaction_id() returns spanner_dbapi.partition_helper.BatchTransactionId [Solution] - Move BatchTransactionId dataclass within spanner_v1 [Additional context] - Required standalone use of google-cloud-spanner
Remove dependency of spanner_dbapi from spanner_v1
[Description]
[Solution]
[Additional context]