Fix S2589 FP: Switch Expression default case with bool literal

[Tim-Pohlmann]

S2589 has an issue with certain switch expressions. Further investigation is required.

enum UserType
{
    Internal,
    External,
    Other
}

interface IUser
{
    int Id { get; }
    string LoginName { get; }
    UserType UserType { get; }
}

static class Program
{
    public static void Check_SwitchExpression(IUser user)
    {
        if (user.UserType switch                         // Noncompliant FP, always false
        {
            UserType.Internal => user.Id == 1,
            UserType.External => user.LoginName == "test",
            _ => false,
        })
            return;

        throw new ApplicationException("not authorized");
    }
}