Keep $continuation in LVT

in case of suspend functions and `this` is case of lambdas, since they
are used in async stack trace generation.
Update tests.
 #KT-40661 Open

compiler/testData/checkLocalVariablesTable/completionInSuspendFunction/staticStateMachine.kt

@@ -4,10 +4,11 @@ suspend fun foo() {}
 suspend fun foo1(l: Long) {
     foo()
     foo()
+    val dead = l
 }
 
 // METHOD : StaticStateMachineKt.foo1(JLkotlin/coroutines/Continuation;)Ljava/lang/Object;
 // VARIABLE : NAME=l TYPE=J INDEX=0
 // VARIABLE : NAME=$completion TYPE=Lkotlin/coroutines/Continuation; INDEX=2
-// VARIABLE : NAME=$continuation TYPE=Lkotlin/coroutines/Continuation; INDEX=4
-// VARIABLE : NAME=$result TYPE=Ljava/lang/Object; INDEX=3
+// VARIABLE : NAME=$continuation TYPE=Lkotlin/coroutines/Continuation; INDEX=6
+// VARIABLE : NAME=$result TYPE=Ljava/lang/Object; INDEX=5