[K/JS] Allow private constructors inside external declarations ^KT-65964 Fixed

compiler/fir/checkers/checkers.web.common/src/org/jetbrains/kotlin/fir/analysis/web/common/checkers/declaration/FirWebCommonExternalChecker.kt

@@ -75,7 +75,7 @@ abstract class FirWebCommonExternalChecker(private val allowCompanionInInterface
         if (declaration is FirPropertyAccessor && declaration.isDirectlyExternal(context.session)) {
             reporter.reportOn(declaration.source, FirWebCommonErrors.WRONG_EXTERNAL_DECLARATION, "property accessor", context)
         } else if (
-            declaration !is FirPrimaryConstructor &&
+            declaration !is FirConstructor &&
             declaration !is FirField &&
             declaration.isPrivateMemberOfExternalClass(context.session)
         ) {

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/JsExternalChecker.kt

@@ -67,7 +67,11 @@ class JsExternalChecker(private val allowCompanionInInterface: Boolean) : Declar
 
         if (descriptor is PropertyAccessorDescriptor && isDirectlyExternal(declaration, descriptor)) {
             trace.report(ErrorsJs.WRONG_EXTERNAL_DECLARATION.on(declaration, "property accessor"))
-        } else if (isPrivateMemberOfExternalClass(descriptor)) {
+        } else if (
+            descriptor !is ConstructorDescriptor &&
+            descriptor !is FieldDescriptor &&
+            isPrivateMemberOfExternalClass(descriptor)
+        ) {
             trace.report(ErrorsJs.WRONG_EXTERNAL_DECLARATION.on(declaration, "private member of class"))
         }