[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/multimodule/duplicateClass/inTheSameModuleWithUsage.fir.kt

@@ -0,0 +1,23 @@
+// MODULE: m1
+// FILE: a.kt
+
+package p
+
+public class A
+public class B {
+    public val a: A = A()
+}
+
+// MODULE: m2(m1)
+// FILE: b.kt
+
+package p
+
+class A {
+    fun foo() {}
+}
+
+fun test() {
+    val a: A = B().a
+    a.foo()
+}