[FIR] Fix incorrect diagnostic behaviour + several enum diagnostics

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

@@ -0,0 +1,18 @@
+class A(x: Int) {
+    constructor(z: String) : this(10)
+}
+
+class B : A {
+    <!EXPLICIT_DELEGATION_CALL_REQUIRED, NONE_APPLICABLE!>constructor()<!>
+    constructor(z: String) : this()
+}
+
+<!SUPERTYPE_INITIALIZED_WITHOUT_PRIMARY_CONSTRUCTOR!>class C : A(20) {
+    <!EXPLICIT_DELEGATION_CALL_REQUIRED, NONE_APPLICABLE!>constructor()<!>
+    constructor(z: String) : this()
+}<!>
+
+class D() : A(20) {
+    <!NONE_APPLICABLE, PRIMARY_CONSTRUCTOR_DELEGATION_CALL_EXPECTED!>constructor(x: Int)<!>
+    constructor(z: String) : this()
+}