IR: fix SAM conversion for types with contravariant intersection argument type

In the added test, the problem was that the SAM type as computed by
`SamTypeFactory.createByValueParameter` was `Consumer<{BaseClass &
BaseInterface}>`, which was latter approximated in psi2ir during the
KotlinType->IrType conversion to `Consumer<out Any?>` (here:
https://github.com/JetBrains/kotlin/blob/3034d9d791cf1f9033104e12448e0d262d3bc3ce/compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/ArgumentsGenerationUtils.kt#L606),
because intersection type argument is approximated to `out Any?`.

To avoid this, replace intersection type in immediate arguments of a SAM
type with the common supertype of its components at the same place where
we're getting rid of projections.

 #KT-45945 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/state/typeMapperUtils.kt

@@ -87,11 +87,6 @@ fun CallableMemberDescriptor.createTypeParameterWithNewName(
     return newDescriptor
 }
 
-fun KotlinType.removeExternalProjections(): KotlinType {
-    val newArguments = arguments.map { TypeProjectionImpl(Variance.INVARIANT, it.type) }
-    return replace(newArguments)
-}
-
 fun isInlineClassConstructorAccessor(descriptor: FunctionDescriptor): Boolean =
     descriptor is AccessorForConstructorDescriptor &&
             descriptor.calleeDescriptor.constructedClass.isInlineClass()