feat: Add QueryArrowStream to snowflakeConn

[zeroshade]

Description

Added a method to snowflakeConn called QueryArrowStream which returns a loader object which can be used to retrieve io.ReadClosers which are Arrow IPC streams of record batches of results. This allows a consumer to fetch Arrow data directly without having to rely on using the "exact same" version of the arrow library as this driver does.

This was instrumental in building out the Snowflake ADBC Driver as per apache/arrow-adbc#586

Checklist

• Code compiles correctly
• Run make fmt to fix inconsistent formats
• Run make lint to get lint errors and fix all of them
• Created tests which fail without the change (if possible)
• All tests passing
• Extended the README / documentation, if necessary

[sfc-gh-igarish]

LGTM

[zeroshade]

@sfc-gh-igarish would you please re-run the tests, I was unable to replicate the test failure myself but I did see one situation where there's a difference in some logic so I think the last change should fix the issue. If not I'll likely need some help debugging this from you guys since I can't replicate this at all on my end hitting my own snowflake test warehouse.