[FIR] Implement new bound smartcast algorithm

#KT-36055 Fixed

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/While.fir.kt

@@ -11,7 +11,7 @@ fun foo() {
     while (y != null) {
         bar(y)
     }
-    bar(y)
+    <!INAPPLICABLE_CANDIDATE!>bar<!>(y)
     
     val z: Int? = null
     while (z == null) {

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/WhileCondition.fir.kt

@@ -22,5 +22,5 @@ fun whileWithNoCondition(x: Int?) {
     while (<!SYNTAX!><!>) {
         x!!
     }
-    checkSubtype<Int>(x)
+    <!INAPPLICABLE_CANDIDATE!>checkSubtype<!><Int>(x)
 }