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

compiler/testData/diagnostics/testsWithStdLib/experimental/override.fir.kt

@@ -0,0 +1,44 @@
+// !USE_EXPERIMENTAL: kotlin.Experimental
+// FILE: api.kt
+
+package api
+
+@Experimental(Experimental.Level.WARNING)
+annotation class E
+
+open class Base {
+    @E
+    open fun foo() {}
+}
+
+class DerivedInSameModule : Base() {
+    override fun foo() {}
+}
+
+// FILE: usage-propagate.kt
+
+package usage1
+
+import api.*
+
+open class Derived : Base() {
+    @E
+    override fun foo() {}
+}
+
+class SubDerived : Derived()
+
+@E
+class Derived2 : Base() {
+    override fun foo() {}
+}
+
+// FILE: usage-none.kt
+
+package usage2
+
+import api.*
+
+class Derived : Base() {
+    override fun foo() {}
+}