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.

idea/testData/decompiler/navigation/decompiled/Color.kt

@@ -4,11 +4,11 @@
 package testData.libraries
 
 [[public final enum class Color private constructor(rgb: kotlin.Int) : kotlin.Enum<testData.libraries.Color> {
-    [[RED]],
+    [[RED,]]
 
-    [[GREEN]],
+    [[GREEN,]]
 
-    [[BLUE]];
+    [[BLUE;]]
 
     [internal final val rgb: kotlin.Int /* compiled code */]
 }]]