[FE] Prohibit expect fun interface to have non-fun actual counterpart

In K1 .isFun is always false for Java classes, so extra check
is added for that. This is not needed for K2, because .isFun is
true for all Java classes. Here it is not necessary to check
that interface has only one method, because such check will be
done in the place where interface implementation is created.

^KT-39362 Fixed

compiler/testData/multiplatform/incompatibleClasses/common.kt

@@ -19,3 +19,11 @@ expect class C4<F>
 
 
 expect abstract class ExtendsNumber : Number
+
+expect fun interface FunInterface {
+    fun run()
+}
+
+expect fun interface FunInterface2 {
+    fun run()
+}

compiler/testData/multiplatform/incompatibleClasses/jvm.kt

@@ -19,3 +19,13 @@ actual typealias C4<F> = C4Impl<F>
 class C4Impl<F : Number>
 
 actual abstract class ExtendsNumber : Any()
+
+actual interface FunInterface {
+    actual fun run()
+}
+
+interface FunInterface2Typealias {
+    fun run()
+}
+
+actual typealias FunInterface2 = FunInterface2Typealias

compiler/testData/multiplatform/incompatibleClasses/output.txt

@@ -113,3 +113,15 @@ The following declaration is incompatible because some supertypes are missing in
 
 actual abstract class ExtendsNumber : Any()
                                       ^
+compiler/testData/multiplatform/incompatibleClasses/jvm.kt:23:1: error: actual interface 'FunInterface' has no corresponding expected declaration
+The following declaration is incompatible because actual declaration for fun expect interface is not a functional interface:
+    public expect fun interface FunInterface
+
+actual interface FunInterface {
+^
+compiler/testData/multiplatform/incompatibleClasses/jvm.kt:31:1: error: actual typealias 'FunInterface2' has no corresponding expected declaration
+The following declaration is incompatible because actual declaration for fun expect interface is not a functional interface:
+    public expect fun interface FunInterface2
+
+actual typealias FunInterface2 = FunInterface2Typealias
+^