Readonly build strategy for Snowflake database

**Is your feature request related to a problem? Please describe.**
We have readonly access to snowflake database. While running pre-aggregations, we realised that it is failing to create a staging table on snowflake and it is because of access permission.

We only have read only database and can't create tables on snowflake. Please enable/support snowflake with readonly access

**Describe the solution you'd like**
Enabling read only access to snowflake ( similar to mysql)

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**
Readonly build strategy for snowflake database