FirSupertypesChecker: implement six more diagnostics

compiler/testData/diagnostics/tests/subtyping/extFunctionTypeAsSuperType.fir.kt

@@ -1,24 +0,0 @@
-class A : Double.() -> Unit {
-    override fun invoke(p1: Double) {}
-}
-
-class B : Int.(Double) -> Unit {
-    override fun invoke(p1: Int, p2: Double) {}
-}
-
-open class C {}
-
-abstract class A0 : C.() -> Int
-abstract class A1 : C.(Int) -> Int
-abstract class A2 : C.(Int, String) -> Int
-
-open class D<T> {}
-
-abstract class B0<T> : D<T>.() -> Int
-abstract class B1<T> : D<T>.(C) -> Int
-abstract class B2<T> : D<T>.(T, C) -> T
-
-interface E<T> {}
-
-abstract class C0: C(), Int.() -> Double
-abstract class C1<T>: C(), E<T>, Int.(C) -> Double

compiler/testData/diagnostics/tests/subtyping/extFunctionTypeAsSuperType.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 class A : <!SUPERTYPE_IS_EXTENSION_FUNCTION_TYPE!>Double.() -> Unit<!> {
     override fun invoke(p1: Double) {}
 }