[FIR] Fix incorrect diagnostic behaviour + several enum diagnostics

compiler/fir/analysis-tests/testData/resolve/diagnostics/delegationSuperCallInEnumConstructor.kt

@@ -0,0 +1,6 @@
+enum class A {
+    A(1), B(2), C("test");
+
+    constructor(x: Int) : <!DELEGATION_SUPER_CALL_IN_ENUM_CONSTRUCTOR!>super<!>()
+    constructor(t: String) : this(10)
+}