fix(ivy): template type checking should consider non-decorated base c…

[JoostK]

…lasses

WIP

Fixes #30080

[JoostK]

This is a first stab at supporting this use-case. The situation where an entirely natural class (without any Angular decorators) exists within the inheritance chain is still not handled properly, as the entire directive would then get flagged as 'dynamic' which affects the template type checking in an undesirable way.

[JoostK]

Holding off from this for now as there's plans to move away from BaseDef to just DirectiveDef.

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