[FIR] add support for implementation by delgation

This commit handles "subclass: super-interface by delegate-expression".

During Psi2Fir, for each delegate, we add to the subclass a synthetic
field (which has type super-interface), and an assignment of the
delegate-expression to the synthetic field in the primary constructor,
so that the delegate-expression can be resolved and transformed along
the way.

During Fir2Ir, we look up delegatable members from the super-interface
and generate corresponding functions/properties for the subclass.

TODO: support for generic delegatable members and generic
super-interface.

compiler/testData/diagnostics/tests/annotations/annotationInheritance.fir.kt

@@ -4,5 +4,5 @@ interface T
 
 annotation class Ann: C()
 annotation class Ann2: T
-annotation class Ann3: T by a
+annotation class Ann3: T by <!ANNOTATION_CLASS_MEMBER!>a<!>
 annotation class Ann4: C(), T