Refine diagnostics reported on implicit constructor delegation call

- Do not report anything else if primary's call expected

- Do not repeat EXPLICIT_DELEGATION_CALL_REQUIRED

 #KT-7230 Fixed

compiler/testData/diagnostics/tests/secondaryConstructors/implicitSuperCallErrorsIfPrimary.kt

@@ -0,0 +1,7 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+open class A(p1: String)
+
+class B() : A("") {
+    <!PRIMARY_CONSTRUCTOR_DELEGATION_CALL_EXPECTED!>constructor(s: String)<!> {
+    }
+}