Revert "[snowflake] Cache information schema queries on snowflake"

[serprex]

Caching is running into issues with things like

CREATE MIRROR
CREATE TARGET SCHEMA
DROP MIRROR
DROP TARGET SCHEMA
CREATE TARGET SCHEMA
CREATE MIRROR

where cache tricks system into thinking metadata tables exist & the system gets stuck trying to use tables it thinks it upsert

Possible there's other issues, but caching needs to be thought over to address:

1. invalidate cache on specific errors
2. either have code bypass cache or make sure the code doesn't rely on the information being fresh
3. whole system being built to recover/resync better