FIR: Fix diagnostics test data after safe-call refactoring

^KT-38444 In Progress

compiler/testData/diagnostics/testsWithStdLib/resolve/javaStaticMembers.fir.kt

@@ -6,7 +6,7 @@ public class Test {
 // FILE: test.kt
 fun ff() {
     val a = Test.FOO
-    val b = Test?.FOO
+    val b = Test?.<!UNRESOLVED_REFERENCE!>FOO<!>
     System.out.println(a + b)
-    System?.out.println(a + b)
-}
+    System?.<!UNRESOLVED_REFERENCE!>out<!>.<!UNRESOLVED_REFERENCE!>println<!>(a + b)
+}

compiler/testData/diagnostics/testsWithStdLib/smartcasts/withChangesToNull.fir.kt

@@ -2,7 +2,7 @@ fun foo(y: String?) {
     var x: String? = ""
     if (x != null) {
         with(y?.let { x = null; it }) {
-            this.length
+            this.<!INAPPLICABLE_CANDIDATE!>length<!>
             x.length
         }
         x.length