[FIR] Implement new bound smartcast algorithm

#KT-36055 Fixed

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

@@ -6,5 +6,5 @@ public fun foo(p: String?): Int {
         if (x()) break
     }
     // p is nullable because it's possible loop body is not executed at all
-    return p.length
+    return p.<!INAPPLICABLE_CANDIDATE!>length<!>
 }

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

@@ -7,5 +7,5 @@ public fun foo(p: String?): Int {
         if (x()) break
     }
     // Smart cast should not work in this case, see KT-6284
-    return p.length
+    return p.<!INAPPLICABLE_CANDIDATE!>length<!>
 }

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

@@ -8,7 +8,7 @@ fun foo() {
 
     }
     // TODO: this testdata fixates undesired behavior (it should be an unsafe call)
-    x.<!UNRESOLVED_REFERENCE!>length<!> // 'x' is unsoundly smartcasted here
+    x.length // 'x' is unsoundly smartcasted here
 }
 
 fun bar() {
@@ -19,5 +19,5 @@ fun bar() {
 
     }
     // TODO: this testdata fixates undesired behavior (it should be an unsafe call)
-    x.<!UNRESOLVED_REFERENCE!>size<!> // 'x' is unsoundly smartcasted here
+    x.size // 'x' is unsoundly smartcasted here
 }

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

@@ -7,7 +7,7 @@ fun foo() {
         break
 
     }
-    x.<!UNRESOLVED_REFERENCE!>length<!> // 'x' is unsoundly smartcasted here
+    x.length // 'x' is unsoundly smartcasted here
 }
 
 fun bar() {
@@ -17,5 +17,5 @@ fun bar() {
         break
 
     }
-    x.<!UNRESOLVED_REFERENCE!>size<!> // 'x' is unsoundly smartcasted here
+    x.size // 'x' is unsoundly smartcasted here
 }