Debugger: use partialBodyResolve. Don't compete variables defined after context element

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/localVariables.kt

@@ -0,0 +1,14 @@
+package localVariables
+
+fun main(args: Array<String>) {
+    val aaa1 = 1
+    //Breakpoint!
+    val t = 2
+    val aaa3 = 2
+}
+
+// EXPRESSION: aaa1
+// RESULT: 1: I
+
+// EXPRESSION: aaa3 + aaa1
+// RESULT: Unresolved reference: aaa3