SA1618 reported for non-exposed members even when documentInternalElements is false

[m-akinc]

When the documentInternalElements or documentPrivateElements option is set to false, SA1618:GenericTypeParametersMustBeDocumented should never be reported for those non-public members which are exempted from the documentation requirement. As expected, there is no reported violation for:

private T Foo<T>()

However, it is reported in the following examples:

///
private T Foo<T>()

/**
 *
 */
private T Foo<T>()

[sharwell]

📝 This was filed per a request in #2361.