Enum parsing changed: first entries, then members. Grammar fixed accordingly.

A set of compiler tests and some plugin tests changed accordingly.
Compiler Kotlin code changed accordingly.

idea/testData/formatter/EmptyLineAfterObjectDeclaration.after.kt

@@ -29,9 +29,9 @@ interface T1
 // -----
 
 enum class E1 {
-    object O7
-
     ENTRY
+
+    object O7
 }
 
 // -----
@@ -67,9 +67,9 @@ interface T2
 // -----
 
 enum class E2 {
-    object O14 {}
-
     ENTRY
+
+    object O14 {}
 }
 
 // -----
@@ -110,8 +110,8 @@ interface T3
 // -----
 
 enum class E3 {
+    ENTRY
+
     object O21 {
     }
-
-    ENTRY
 }