Handle diffing of future grants better
https://docs.snowflake.net/manuals/sql-reference/sql/show-grants.html#show-grants will now show future grants so we don't always have to assume they're new.
https://docs.snowflake.net/manuals/sql-reference/sql/show-grants.html#show-grants will now show future grants so we don't always have to assume they're new.