[FIR JS] Prepare the test data for FIR

compiler/testData/diagnostics/testsWithJsStdLib/name/conflictingNamesFromSuperclass.fir.kt

@@ -0,0 +1,23 @@
+interface A {
+    @JsName("foo") fun f()
+}
+
+interface B {
+    @JsName("foo") fun g()
+}
+
+class C : A, B {
+    override fun f() {}
+
+    override fun g() {}
+}
+
+abstract class D : A, B
+
+open class E {
+    open fun f() {}
+
+    open fun g() {}
+}
+
+class F : E(), A, B