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/testData/ir/irText/expressions/primitivesImplicitConversions.kt

@@ -0,0 +1,9 @@
+fun test() {
+    val test1: Int? = 42
+    val test2: Long = 42
+    val test3: Long? = 42
+    val test4: Long? = -1
+    val test5: Long? = 1.unaryMinus()
+    val test6: Short? = 1.unaryMinus()
+    val test7: Byte? = 1.unaryMinus()
+}