Evaluate: Support synthetic 'field' variable evaluation (KT-28342)

idea/testData/debugger/tinyApp/src/evaluate/multipleBreakpoints/fieldVariable.kt

@@ -0,0 +1,27 @@
+package fieldVariable
+
+class Foo {
+    val a: String? = "field"
+        get() {
+            //Breakpoint!
+            val a = 5
+            return "not a " + field
+        }
+
+    val b: String?
+        get() {
+            //Breakpoint!
+            return "b"
+        }
+}
+
+fun main() {
+    Foo().a
+    Foo().b
+}
+
+// EXPRESSION: field
+// RESULT: "field": Ljava/lang/String;
+
+// EXPRESSION: field
+// RESULT: Can't find a backing field for property field

idea/testData/debugger/tinyApp/src/evaluate/multipleBreakpoints/fieldVariable.out

@@ -0,0 +1,11 @@
+LineBreakpoint created at fieldVariable.kt:7
+LineBreakpoint created at fieldVariable.kt:14
+Run Java
+Connected to the target VM
+fieldVariable.kt:7
+Compile bytecode for field
+fieldVariable.kt:14
+Compile bytecode for field
+Disconnected from the target VM
+
+Process finished with exit code 0