fix: Make sure schema is used when generating `from_expression` for Snowflake by TomSteenbergen · Pull Request #4177 · feast-dev/feast

What this PR does / why we need it:

This PR ensures that the from_expression used in the Snowflake offline store is generated correctly when the datasource already specifies the schema name.

Which issue(s) this PR fixes:

Currently, the schema name of the Snowflake data source is disregarded when generating the from_expression. So if the data source already specifies a schema, an invalid from_expression is generated where both the schema of the offline store config as well as the schema on the data source are used to construct the from_expression.