[FIR] Track inc and dec operator calls in preliminary loop visitor, ^KT-44879 Fixed

compiler/testData/diagnostics/tests/smartCasts/variables/varNotChangedInLoop.fir.kt

@@ -2,7 +2,7 @@ public fun foo() {
     var i: Any = 1
     if (i is Int) {
         while (i != 10) {
-            i<!UNRESOLVED_REFERENCE!>++<!>
+            i++
         }
     }
 }

compiler/testData/diagnostics/tests/smartCasts/varnotnull/varNotChangedInLoop.fir.kt

@@ -2,7 +2,7 @@ public fun foo() {
     var i: Int? = 1
     if (i != null) {
         while (i != 10) {
-            i<!UNSAFE_CALL!>++<!>
+            i++
         }
     }
 }