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

idea/jvm-debugger/jvm-debugger-test/testData/asyncStackTrace/asyncFunctions.kt

@@ -5,12 +5,15 @@ suspend fun main() {
     val b = 7
     none()
     foo()
+    val dead1 = a
+    val dead2 = b
 }
 
 suspend fun foo() {
     val x = "foo"
     none()
     bar()
+    val dead = x
 }
 
 suspend fun bar() {
@@ -19,6 +22,7 @@ suspend fun bar() {
     val z = "bar"
     //Breakpoint!
     val a = 5
+    val dead = y
 }
 
 suspend fun none() {}

idea/jvm-debugger/jvm-debugger-test/testData/asyncStackTrace/asyncFunctions.out

@@ -1,11 +1,11 @@
-LineBreakpoint created at asyncFunctions.kt:21
+LineBreakpoint created at asyncFunctions.kt:24
 Run Java
 Connected to the target VM
-asyncFunctions.kt:21
+asyncFunctions.kt:24
 Async stack trace:
-    asyncFunctions.AsyncFunctionsKt:18
+    asyncFunctions.AsyncFunctionsKt:21
         y = "zoo"
-    asyncFunctions.AsyncFunctionsKt:13
+    asyncFunctions.AsyncFunctionsKt:15
         x = "foo"
     asyncFunctions.AsyncFunctionsKt:7
         a = 5