Allow disabling NullabilityMisalignment

[mwisnicki]

Some databases report wrong nullability information (e.g. aws/amazon-redshift-jdbc-driver#144)

This prevents me from using checkOutput. Having some way of disabling nullability checks would be helpful.

[AyushPrakash414]

This causes checkOutput to fail due to mismatched nullability information.

I’d like to take up this task and work on adding an option to disable or bypass nullability checks for such cases. This would make the library more robust across JDBC implementations that don’t strictly follow metadata standards.

Please assign this issue to me so I can start working on a possible solution.