Prohibit functional interface constructor references

#KT-36706 Fixed

compiler/testData/diagnostics/tests/funInterface/prohibitFunInterfaceConstructorReferences.fir.kt

@@ -0,0 +1,7 @@
+fun interface Foo {
+    fun run()
+}
+
+val x = ::Foo
+val y = Foo { }
+val z = ::Runnable

compiler/testData/diagnostics/tests/funInterface/prohibitFunInterfaceConstructorReferences.kt

@@ -0,0 +1,7 @@
+fun interface Foo {
+    fun run()
+}
+
+val x = ::<!FUN_INTERFACE_CONSTRUCTOR_REFERENCE!>Foo<!>
+val y = Foo { }
+val z = ::Runnable

compiler/testData/diagnostics/tests/funInterface/prohibitFunInterfaceConstructorReferences.txt

@@ -0,0 +1,12 @@
+package
+
+public val x: kotlin.reflect.KFunction1<() -> kotlin.Unit, Foo>
+public val y: Foo
+public val z: kotlin.reflect.KFunction1<() -> kotlin.Unit, java.lang.Runnable>
+
+public fun interface Foo {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract fun run(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}