Snowflake: Support for Key-Pair authentication

[absorbb]

Snowflake is going to block password based auth by Nov 2025
https://www.snowflake.com/en/blog/blocking-single-factor-password-authentification/

We must support alternative auth methods:
https://docs.snowflake.com/en/user-guide/key-pair-auth.html#configuring-key-pair-authentication

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[absorbb]

Fixed in v2.9.0