FE: don't create KtFile stubs on virtual files without ids

This commit is kinda revert of the change in platform 203:
https://github.com/JetBrains/intellij-community/commit/5d91f7bf2e5718d715c0d90ed1a212ea845fb2a3

#KT-49833 Fixed

compiler/tests-gen/org/jetbrains/kotlin/cli/CliTestGenerated.java

@@ -686,6 +686,11 @@ public class CliTestGenerated extends AbstractCliTest {
             runTest("compiler/testData/cli/jvm/newInferenceWithOldFlagImpliesSamConversions.args");
         }
 
+        @TestMetadata("newLineInPackage.args")
+        public void testNewLineInPackage() throws Exception {
+            runTest("compiler/testData/cli/jvm/newLineInPackage.args");
+        }
+
         @TestMetadata("noReflect.args")
         public void testNoReflect() throws Exception {
             runTest("compiler/testData/cli/jvm/noReflect.args");