Keep DebugMetadata annotation when regenerate lambda with state-machine

When a suspend lambda does not capture crossinline lambda, it is
generated with as state-machine, since it does not inline anything.
However, when regenerating, the inliner used to remove all DebugMetadata
annotations to avoid duplication. This lead to missing annotation if
the lambda is regenerated, but state-machine is not regenerated.
This change fixes the blind spot by readding the annotation after
regeneration.
 #KT-41789 Fixed

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxInlineCodegenTestGenerated.java

@@ -3818,6 +3818,11 @@ public class BlackBoxInlineCodegenTestGenerated extends AbstractBlackBoxInlineCo
             runTestWithPackageReplacement("compiler/testData/codegen/boxInline/suspend/crossinlineSuspendLambdaInsideCrossinlineSuspendLambda.kt", "kotlin.coroutines");
         }
 
+        @TestMetadata("debugMetadataCrossinline.kt")
+        public void testDebugMetadataCrossinline() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/suspend/debugMetadataCrossinline.kt");
+        }
+
         @TestMetadata("delegatedProperties.kt")
         public void testDelegatedProperties_1_2() throws Exception {
             runTestWithPackageReplacement("compiler/testData/codegen/boxInline/suspend/delegatedProperties.kt", "kotlin.coroutines.experimental");