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

compiler/testData/diagnostics/tests/extensions/extensionMemberInClassObject.fir.kt

@@ -0,0 +1,18 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+interface JPAEntityClass<D> {
+    fun <T> T.findByName(s: String): D {null!!}
+}
+
+class Foo {
+    companion object : JPAEntityClass<Foo>
+}
+
+fun main() {
+    with("", {
+        Foo.<!UNRESOLVED_REFERENCE!>findByName<!>("")
+    })
+    with(Foo) {
+        findByName("")
+    }
+}