Suppress some type errors during partial analysis

[AtomCrafty]

• Suppresses com.minres.coredsl.NonScalarCondition for error types
• Suppresses com.minres.coredsl.InvalidCast for signedness casts on error types
• Allows assignments where the target has an integer type and the right hand side is a constant expression whose value fits in said type (effectively closes Relax assignment rules for constant RHS #75)

Please let me know if you come across more of these instances where errors are reported in instruction sets (aka. during partial analysis) due to type information not being fully available.