Support specifying durability for Memory Optimized tables

When adding a memory optimized table, the database is also configured as memory optimized. I need to use a table DURABILITY of SCHEMA_ONLY, but that option is not exposed through EFC (#6405). Durability can only be set when the table is created. This will require a custom migration for the table which would then also require custom migration to change the database configuration.

**Is there any configuration I can use to set the database to allow memory optimized tables without also creating a table?**

I'd prefer to use the built-in configurations for the database as that would also make the configuration visible in code.

The alternative is that I create the memory optimized table with standard durability so the database is configured, then use a custom migration to drop and recreate the table with the desired durability.

And just in case the SCHEMA_ONLY question is raised, I have an integration point with an external app that needs to have a high performance way of performing CRUD operations. No data is needed between restarts and using SCHEMA_ONLY eliminates disk I/O to further improve performance.