[FIR] Fix ClassCastException when rendering ACTUAL_WITHOUT_EXPECT

#KT-57320

compiler/testData/diagnostics/tests/multiplatform/hmpp/kt57320.fir.kt

@@ -0,0 +1,42 @@
+// !LANGUAGE: +MultiPlatformProjects
+
+// MODULE: common
+// TARGET_PLATFORM: Common
+
+// FILE: StringValue.kt
+<!NO_ACTUAL_FOR_EXPECT{JS}!>expect class StringValue<!>
+
+<!NO_ACTUAL_FOR_EXPECT{JS}!>expect fun StringValue.plus(other: String): StringValue<!>
+
+// MODULE: commonJS()()(common)
+// TARGET_PLATFORM: JS
+
+// FILE: StringValue.kt
+actual class Strin<!NO_ACTUAL_FOR_EXPECT{JS}!>gValue(val value: String<!>)
+<!NO_ACTUAL_FOR_EXPECT{JS}!>
+actual fun StringValue.plus(other: String) = StringVal<!>ue(this.value + other)
+
+// MODULE: intermediate()()(common)
+// TARGET_PLATFORM: Common
+
+// FILE: StringDemoInterface.kt
+expect interface StringDemoInterface
+
+interface KotlinXStringDemoInterface {
+    val value: String
+}
+
+expect fun StringDemoInterface.plusK(): String
+
+// MODULE: js()()(common, intermediate)
+// TARGET_PLATFORM: JS
+
+// FILE: StringDemoInterface.kt
+actual typealias StringDemoInterface = KotlinXStringDemoInterface
+
+<!ACTUAL_WITHOUT_EXPECT("actual  fun StringDemoInterface.plusK(): <ERROR TYPE REF: Unresolved name: value>; The following declaration is incompatible:    expect fun StringDemoInterface.plusK(): String")!>actual fun StringDemoInterface.plusK() = <!RESOLUTION_TO_CLASSIFIER!>StringValue<!>(value).plus("K").<!UNRESOLVED_REFERENCE!>value<!><!>
+
+// FILE: main.kt
+class StringDemo(override val value: String) : StringDemoInterface
+
+fun box() = StringDemo("O").plusK()

compiler/testData/diagnostics/tests/multiplatform/hmpp/kt57320.kt

@@ -0,0 +1,42 @@
+// !LANGUAGE: +MultiPlatformProjects
+
+// MODULE: common
+// TARGET_PLATFORM: Common
+
+// FILE: StringValue.kt
+expect class <!NO_ACTUAL_FOR_EXPECT{JS}!>StringValue<!>
+
+expect fun StringValue.<!NO_ACTUAL_FOR_EXPECT{JS}!>plus<!>(other: String): StringValue
+
+// MODULE: commonJS()()(common)
+// TARGET_PLATFORM: JS
+
+// FILE: StringValue.kt
+actual class StringValue(val value: String)
+
+actual fun StringValue.plus(other: String) = StringValue(this.value + other)
+
+// MODULE: intermediate()()(common)
+// TARGET_PLATFORM: Common
+
+// FILE: StringDemoInterface.kt
+expect interface StringDemoInterface
+
+interface KotlinXStringDemoInterface {
+    val value: String
+}
+
+expect fun StringDemoInterface.plusK(): <!NO_ACTUAL_FOR_EXPECT{JS}!>String<!>
+
+// MODULE: js()()(common, intermediate)
+// TARGET_PLATFORM: JS
+
+// FILE: StringDemoInterface.kt
+actual typealias StringDemoInterface = KotlinXStringDemoInterface
+
+actual fun StringDemoInterface.<!ACTUAL_WITHOUT_EXPECT("Actual function 'plusK'; The following declaration is incompatible because return type is different:    public expect fun StringDemoInterface /* = KotlinXStringDemoInterface */.plusK(): String")!>plusK<!>() = <!RESOLUTION_TO_CLASSIFIER!>StringValue<!>(value).<!DEBUG_INFO_MISSING_UNRESOLVED!>plus<!>("K").<!DEBUG_INFO_MISSING_UNRESOLVED!>value<!>
+
+// FILE: main.kt
+class StringDemo(override val value: String) : StringDemoInterface
+
+fun box() = StringDemo("O").plusK()