[FIR] Desugar increment/decrement in body resolve phase

The expression needs to be resolved first to determine if there is a
receiver that needs to be extracted to a temporary variable. Also, the
special case for prefix increment/decrement on local variable without
delegates requires resolution to check if the variable is local.

^KT-56771 Fixed
^KT-56659 Fixed

compiler/testData/diagnostics/tests/LValueAssignment.fir.kt

@@ -106,7 +106,7 @@ class Test() {
 
     fun testIncompleteSyntax() {
         val s = "s"
-        <!UNRESOLVED_REFERENCE!>++<!>s.<!SYNTAX!><!>
+        <!UNRESOLVED_REFERENCE!>++<!><!VARIABLE_EXPECTED!>s<!>.<!SYNTAX!><!>
     }
 
     fun testVariables() {