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

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

@@ -0,0 +1,23 @@
+// !USE_EXPERIMENTAL: kotlin.Experimental
+// !EXPERIMENTAL: api.ExperimentalAPI
+// MODULE: api
+// FILE: api.kt
+
+package api
+
+@Experimental
+annotation class ExperimentalAPI
+
+@ExperimentalAPI
+fun function(): String = ""
+
+// MODULE: usage(api)
+// FILE: usage.kt
+
+package usage
+
+import api.*
+
+fun use() {
+    function()
+}