[FIR] Fix crash caused by cast of raw type to simple type

#KT-66552 Fixed

compiler/testData/diagnostics/tests/j+k/rawTypeCrash.kt

@@ -0,0 +1,25 @@
+// FIR_IDENTICAL
+// ISSUE: KT-66552
+
+// FILE: JsStubElementType.java
+public interface JsStubElementType<E, S extends JsStubElement<E>> {}
+
+// FILE: JsStubElement.java
+public interface JsStubElement<T> {
+    <E, S extends JsStubElement<E>> void findChildStubByType(JsStubElementType<E, S> childStubType);
+}
+
+// FILE: FromJava.java
+public interface FromJava {
+    JsStubElement RAW_TYPED_STUB = null;
+}
+
+// FILE: Kotlin.kt
+interface JsStubElementSubType: JsStubElement<Any>
+
+fun test(childStubType: JsStubElementType<Any, JsStubElement<Any>>) {
+    val rawTypedStub = FromJava.RAW_TYPED_STUB
+    if (rawTypedStub is JsStubElementSubType) {
+        rawTypedStub.findChildStubByType(childStubType)
+    }
+}