Add test for obsolete issue

#KT-38161 Obsolete

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

@@ -0,0 +1,9 @@
+fun interface Bar {
+    fun invoke(): String
+}
+
+operator fun Bar.plus(b: Bar): String = invoke() + b.invoke()
+
+fun box(): String {
+    return { "O" } <!INAPPLICABLE_CANDIDATE!>+<!> { "K" }
+}

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

@@ -0,0 +1,9 @@
+fun interface Bar {
+    fun invoke(): String
+}
+
+operator fun Bar.plus(b: Bar): String = invoke() + b.invoke()
+
+fun box(): String {
+    return { "O" } <!DEBUG_INFO_UNRESOLVED_WITH_TARGET, UNRESOLVED_REFERENCE_WRONG_RECEIVER!>+<!> { "K" }
+}

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

@@ -0,0 +1,11 @@
+package
+
+public fun box(): kotlin.String
+public operator fun Bar.plus(/*0*/ b: Bar): kotlin.String
+
+public fun interface Bar {
+    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 invoke(): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}