test(csharp/test/Drivers/Interop/Snowflake): Numeric operator tests f…

…or Snowflake (#1528)

Adds numeric operator tests for Snowflake c-sharp ADBC driver.
- [x] Unary +
- [x] Unary -
- [x] Addition
- [x] Subtraction
- [x] Multiplication
- [x] Division
- [x] Modulo