Do not validate for primitive objects.

[maliming]

string is also IEnumerable, so some performance problems are solved.

abp/framework/src/Volo.Abp.Validation/Volo/Abp/Validation/DataAnnotationObjectValidationContributor.cs

Lines 61 to 67 in 5007709

	var validatingObjectType = validatingObject.GetType();
	//Do not recursively validate for primitive objects
	if (TypeHelper.IsPrimitiveExtended(validatingObjectType))
	{
	return;
	}