- compute a FunctionCaller instance for getter and setter so that "call" only
delegates to that FunctionCaller's "call", in the same way it's done in
KFunctionImpl
- use RuntimeTypeMapper.mapPropertySignature to get the exact origin and
signature of a property and its accessors. This makes unwrapFakeOverride call
unnecessary and also fixes some cases like private Java fields
- temporarily drop custom range checks, will be re-added soon
