test: Port delta-spark schema comparison tests to kernel

[OussamaSaoudi]

Context

This PR introduces schema compatibility comparison to kernel. One usecase of the schema comparison is to enable CDF over a range with an evolving Table schema. This check is meant to allow tables to add nullable columns to a schema, or to loosen the nullability constraint for a column.

Task

Port existing tests for the isReadCompatible method in delta spark. Our implementation should match their behaviour with all the default flags ( eg: allowMissingColumns = false, forbidTightenNullability = false).