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

compiler/testData/diagnostics/tests/imports/NestedClassClash.fir.kt

@@ -0,0 +1,31 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+// FILE: a.kt
+package a
+
+class A {
+    class B
+}
+
+// FILE: b.kt
+package a
+
+class D {
+    class B
+}
+
+// FILE: c.kt
+import a.A.B
+import a.D.B
+
+fun test(b: B) {
+    B()
+}
+
+// FILE: d.kt
+import a.A.*
+import a.D.*
+
+// todo ambiguvity here
+fun test2(b: B) {
+    B()
+}