[FIR] Let prefix inc/dec call getter twice for compatibility with K1

#KT-57179 Fixed

compiler/testData/diagnostics/tests/prefixIncSmartCast.kt

@@ -0,0 +1,13 @@
+// Changed in K2, see KT-57178
+
+open class I {
+    operator fun inc(): ST = ST()
+}
+
+class ST : I()
+
+fun main() {
+    var local = I()
+    val x: ST = ++local
+    val y: ST = <!TYPE_MISMATCH!>local<!>
+}