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/parametersInSuspendLambda/underscoreNames.kt

@@ -7,7 +7,9 @@ class A {
 
 suspend fun foo(a: A, block: suspend (A) -> String): String = block(a)
 
-suspend fun test() = foo(A()) { (x_param, _, y_param) -> x_param + y_param }
+suspend fun test() = foo(A()) { (x_param, _, y_param) ->
+    x_param + y_param
+}
 
 // Parameters (including anonymous destructuring parameters) are moved to fields in the Continuation class for the suspend lambda class.
 // However, in non-IR, the fields are first stored in local variables, and they are not read directly (even for destructuring components).
@@ -16,7 +18,6 @@ suspend fun test() = foo(A()) { (x_param, _, y_param) -> x_param + y_param }
 // METHOD : UnderscoreNamesKt$test$2.invokeSuspend(Ljava/lang/Object;)Ljava/lang/Object;
 
 // JVM_TEMPLATES
-// VARIABLE : NAME=$dstr$x_param$_u24__u24$y_param TYPE=LA; INDEX=2
 // VARIABLE : NAME=x_param TYPE=Ljava/lang/String; INDEX=3
 // VARIABLE : NAME=y_param TYPE=Ljava/lang/String; INDEX=4
 // VARIABLE : NAME=this TYPE=LUnderscoreNamesKt$test$2; INDEX=0