SNOW-1858462: Support authentication via private_key_base64

[AtollRewe]

What is the current behavior?

Not too long ago, the JDBC driver enabled a parameter called private_key_base64 (https://docs.snowflake.com/en/developer-guide/jdbc/jdbc-parameters#private-key-base64) to pass a key directly via parameter, not requiring a PEM file. As far as I can tell from experimenting and looking at the code, this isn't supported by snowflake-connector-python in any way.

What is the desired behavior?

Just like passing private_key to the connector right now, passing private_key_base64 should be a supported option.

How would this improve snowflake-connector-python?

Feature parity (at least in this aspect) with JDBC; reduces the initial barrier for setting up a connection.

References and other background

No response

[sfc-gh-dszmolka]

hi - thank you for submitting this enhancement request, the team will consider for future planning