FIR: Support FirComparisonOperator in body transformers and DFA

^KT-31163 In Progress

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

@@ -3,7 +3,7 @@
 fun indexOfMax(a: IntArray): Int? {
     var maxI: Int? = 0
     a.forEachIndexed { i, value ->
-        if (value >= <!INAPPLICABLE_CANDIDATE!>a[maxI]<!>) {
+        if (value <!AMBIGUITY!>>=<!> <!INAPPLICABLE_CANDIDATE!>a[maxI]<!>) {
             maxI = i
         }
         else if (value < 0) {
@@ -11,4 +11,4 @@ fun indexOfMax(a: IntArray): Int? {
         }
     }
     return maxI
-}
+}