WIP on threadpool impl of query_namespaces#405

jhamon wants to merge 4 commits intojhamon/grpc-asynciopinecone-io/pinecone-python-client:jhamon/grpc-asynciofrom

jhamon/query_namespaces_threadpoolpinecone-io/pinecone-python-client:jhamon/query_namespaces_threadpoolCopy head branch name to clipboard