Update the Snowflake connector to passwordless

**Is your feature request related to a problem? Please describe.**
The Snowflake is about to deprecate the Single Password sign in:
https://docs.snowflake.com/en/user-guide/security-mfa-rollout

We need to prepare for this change since we have many snowflake users.

**Describe the solution you'd like**
Following the offical document of Snowflake and make apporiate changes.