Drop old enum syntax. Comma / semicolon are now a syntactic part of enum entry.

Comma must present now between enum entries, semicolon between last entry & first member, constructor calls must be without colons / specifiers.
A swarm of tests fixed accordingly.

compiler/testData/loadJava/compiledKotlin/enum/enumWithConstuctor.kt

@@ -1,7 +1,8 @@
+// ALLOW_AST_ACCESS
 package test
 
 enum class En(val b: Boolean = true, val i: Int = 0) {
-    E1: En()
-    E2: En(true, 1)
-    E3: En(i = 2)
+    E1(),
+    E2(true, 1),
+    E3(i = 2)
 }

compiler/testData/loadJava/compiledKotlin/enum/enumWithInnerClasses.kt

@@ -2,7 +2,7 @@
 package test
 
 enum class Enum {
-    ENTRY1 ENTRY2
+    ENTRY1, ENTRY2;
 
     inner class Inner
 

compiler/testData/loadJava/compiledKotlin/fromLoadJava/enum.kt

@@ -1,6 +1,7 @@
+// ALLOW_AST_ACCESS
 package test
 
 enum class Test(a : Int) {
-  A : Test(0)
-  B : Test(0) {}
+  A(0),
+  B(0) {}
 }

compiler/testData/loadJava/compiledKotlin/memberOrder/enumEntries.kt

@@ -1,12 +1,12 @@
 package test
 
 enum class E {
-    ONE
-    TWO
-    THREE
-    FOUR
-    FIVE
-    SIX
-    SEVEN
+    ONE,
+    TWO,
+    THREE,
+    FOUR,
+    FIVE,
+    SIX,
+    SEVEN,
     EIGHT
 }