KT-16436 Incorrect primitive constants handling

Expression '1.unaryMinus()' is resolved as Int::unaryMinus call with Int receiver.
However, this expression is implicitly coerced to a different integral type (Byte, Short, Long)
based on results of constant evaluation.

Introduce IMPLICIT_INTEGER_COERCION type operator to handle such cases.

TODO: should we use it for simple constant expressions like '1' and '-1'?

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/IrTypeOperatorCall.kt

@@ -23,6 +23,7 @@ enum class IrTypeOperator {
     IMPLICIT_CAST,
     IMPLICIT_NOTNULL,
     IMPLICIT_COERCION_TO_UNIT,
+    IMPLICIT_INTEGER_COERCION,
     SAFE_CAST,
     INSTANCEOF,
     NOT_INSTANCEOF;