Rename test files to scripts to trigger proper scripting initialization

fix generation config accordingly

compiler/testData/diagnostics/testsWithStdLib/experimental/scripts.kts

@@ -0,0 +1,46 @@
+// !USE_EXPERIMENTAL: kotlin.Experimental
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+// FILE: api.kt
+
+package api
+
+@Experimental(Experimental.Level.WARNING)
+annotation class ExperimentalAPI
+
+@ExperimentalAPI
+fun function(): String = ""
+
+// FILE: usage-propagate.kts
+
+import api.*
+
+@ExperimentalAPI
+fun use() {
+    function()
+}
+
+<!EXPERIMENTAL_API_USAGE!>function<!>()
+<!EXPERIMENTAL_API_USAGE!>use<!>()
+
+// FILE: usage-use.kts
+
+@file:UseExperimental(ExperimentalAPI::class)
+import api.*
+
+fun use() {
+    function()
+}
+
+function()
+use()
+
+// FILE: usage-none.kts
+
+import api.*
+
+fun use() {
+    <!EXPERIMENTAL_API_USAGE!>function<!>()
+}
+
+<!EXPERIMENTAL_API_USAGE!>function<!>()
+use()