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

compiler/testData/diagnostics/tests/override/ConflictingPropertySignatureFromSuperclass.fir.kt

@@ -0,0 +1,8 @@
+// !DIAGNOSTICS: -TYPE_PARAMETER_OF_PROPERTY_NOT_USED_IN_RECEIVER
+open class Aaa() {
+    val bar = 1
+}
+
+open class Bbb() : Aaa() {
+    val <T> bar = "aa"
+}