Prohibit constructors declarations for object

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

@@ -0,0 +1,20 @@
+object A {
+    <!SECONDARY_CONSTRUCTOR_IN_OBJECT!>constructor() {}<!>
+    init {}
+}
+
+enum class B {
+    X : B() {
+        <!SECONDARY_CONSTRUCTOR_IN_OBJECT!>constructor() {}<!>
+    }
+}
+
+class C {
+    default object {
+        <!SECONDARY_CONSTRUCTOR_IN_OBJECT!>constructor() {}<!>
+    }
+}
+
+val anonObject = object {
+    <!SECONDARY_CONSTRUCTOR_IN_OBJECT!>constructor() {}<!>
+}