[cDAC] implement DacDbi GetTypeLayout/GetArrayLayout

[Copilot]

Description

Implements cDAC-side DacDbi type/array layout APIs and adds RuntimeTypeSystem classification APIs required for this.

    bool IsObjRef(TypeHandle typeHandle) => throw new NotImplementedException();
    CorElementType GetInternalCorElementType(TypeHandle typeHandle) => throw new NotImplementedException();

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