Deprecate simplification of complex boolean constant expressions in whens and loops

^KT-39883 In Progress

compiler/testData/diagnostics/tests/annotations/onLoopsUnreachable.fir.kt

@@ -1,3 +1,4 @@
+// LANGUAGE: -ProhibitSimplificationOfNonTrivialConstBooleanExpressions
 fun test() {
     @ann
     while (2 > 1) {}
@@ -9,4 +10,4 @@ fun test() {
     for (i in 1..2) {}
 }
 
-annotation class ann
+annotation class ann