fix(sqlalchemy-spanner): handle TOKENLIST and unknown column types in introspection#16622

waiho-gumloop wants to merge 2 commits intogoogleapis:maingoogleapis/google-cloud-python:mainfrom

waiho-gumloop:fix/sqlalchemy-spanner-tokenlist-typewaiho-gumloop/google-cloud-python:fix/sqlalchemy-spanner-tokenlist-typeCopy head branch name to clipboard