[FIR] Fix data-flow after while loops

compiler/testData/diagnostics/tests/smartCasts/loops/doWhileNull.fir.kt

@@ -1,5 +1,5 @@
 fun foo(s: String?): Int {
     do {
     } while (s==null)
-    return s.<!INAPPLICABLE_CANDIDATE!>length<!>
+    return s.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/nestedDoWhile.fir.kt

@@ -7,7 +7,7 @@ public fun foo(p: String?, r: String?): Int {
         } while (r == null)  
     } while (!x())
     // Auto cast possible
-    r.<!INAPPLICABLE_CANDIDATE!>length<!>
+    r.length
     // Auto cast possible
     return p.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/nestedDoWhileWithLongContinue.fir.kt

@@ -8,7 +8,7 @@ public fun foo(p: String?, r: String?): Int {
         } while (r == null)  
     } while (!x())
     // Auto cast NOT possible due to long continue
-    r.<!INAPPLICABLE_CANDIDATE!>length<!>
+    r.length
     // Auto cast possible
     return p.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/nestedLoops.fir.kt

@@ -11,7 +11,7 @@ public fun foo(p: String?, r: String?, q: String?): Int {
         if (!x()) break
     }
     // Smart cast is possible everywhere
-    r.<!INAPPLICABLE_CANDIDATE!>length<!>
+    r.length
     q.length
     return p.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/nestedLoopsShort.fir.kt

@@ -9,7 +9,7 @@ public fun foo(p: String?, r: String?, q: String?): Int {
         if (!x()) break
     }
     // Smart cast is possible everywhere
-    r.<!INAPPLICABLE_CANDIDATE!>length<!>
+    r.length
     q.length
     return p.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/nestedLoopsWithBreak.fir.kt

@@ -12,7 +12,7 @@ public fun foo(p: String?, r: String?, q: String?): Int {
         if (!x()) break
     }
     // Smart cast is possible everywhere
-    r.<!INAPPLICABLE_CANDIDATE!>length<!>
+    r.length
     q.length
     return p.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/nestedLoopsWithLongContinue.fir.kt

@@ -14,6 +14,6 @@ public fun foo(p: String?, r: String?, q: String?): Int {
     // Smart cast is possible only for q
     q.length
     // But not possible for the others
-    r.<!INAPPLICABLE_CANDIDATE!>length<!>
+    r.length
     return p.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/whileNull.fir.kt

@@ -1,5 +1,5 @@
 fun foo(s: String?): Int {
     while (s==null) {
     }
-    return s.<!INAPPLICABLE_CANDIDATE!>length<!>
+    return s.length
 }

compiler/testData/diagnostics/tests/smartCasts/loops/whileNullAssignToSomething.fir.kt

@@ -5,5 +5,5 @@ fun main() {
         if (i == 10) result = "non null"
         else i++
     }
-    result.<!INAPPLICABLE_CANDIDATE!>length<!>
+    result.length
 }