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/refactoring/changeSignature/OverridesInEnumEntriesAfter.kt

@@ -1,6 +1,4 @@
 enum class E {
-    open fun foo(n: Int, s: String): Int = n
-
     O
     A {
         override fun foo(n: Int, s: String): Int = n + 1
@@ -10,4 +8,6 @@ enum class E {
         override fun foo(n: Int, s: String): Int = n + 2
 
     }
+
+    open fun foo(n: Int, s: String): Int = n
 }

idea/testData/refactoring/changeSignature/OverridesInEnumEntriesBefore.kt

@@ -1,6 +1,4 @@
 enum class E {
-    open fun <caret>foo(n: Int): Int = n
-
     O
     A {
         override fun foo(n: Int): Int = n + 1
@@ -10,4 +8,6 @@ enum class E {
         override fun foo(n: Int): Int = n + 2
 
     }
+
+    open fun <caret>foo(n: Int): Int = n
 }

idea/testData/refactoring/rename/renameKotlinFunctionInEnum/after/RenameKotlinFunctionInEnum.kt

@@ -1,8 +1,6 @@
 package test
 
 enum class E {
-    open fun bar(n: Int): Int = n
-
     O
     A {
         override fun bar(n: Int): Int = n + 1
@@ -12,4 +10,6 @@ enum class E {
         override fun bar(n: Int): Int = n + 2
 
     }
+
+    open fun bar(n: Int): Int = n
 }

idea/testData/refactoring/rename/renameKotlinFunctionInEnum/before/RenameKotlinFunctionInEnum.kt

@@ -1,8 +1,6 @@
 package test
 
 enum class E {
-    open fun foo(n: Int): Int = n
-
     O
     A {
         override fun foo(n: Int): Int = n + 1
@@ -12,4 +10,6 @@ enum class E {
         override fun foo(n: Int): Int = n + 2
 
     }
+
+    open fun foo(n: Int): Int = n
 }