Adjust testData to new labels syntax

compiler/testData/diagnostics/tests/resolve/nestedCalls/analyzeUnmappedArguments.kt

@@ -1,7 +1,7 @@
 package c
 
 fun test() {
-    with (1) @l {
+    with (1) l@ {
         foo(1, <!NAMED_PARAMETER_NOT_FOUND!>zz<!> = { this@l } )
     }
 }

compiler/testData/diagnostics/tests/resolve/nestedCalls/argumentsInParentheses.kt

@@ -14,7 +14,7 @@ fun test(bar: Bar, a: A) {
     // no elements with error types
     fooInt((bar()))
     fooInt(if (true) bar() else bar())
-    fooInt(@label bar())
+    fooInt(label@ bar())
     fooInt(a.bar())
-    fooInt(((@label if (true) (a.bar()) else bar())))
+    fooInt(((label@ if (true) (a.bar()) else bar())))
 }