Offer a way to remove things added by being a record

[fjmorel]

We've started using records a lot for services because not having to write out the constructor and all the private readonly fields is convenient.

It would be nice to have the option to exclude those things from the generated interface. Specifically:

• the Deconstruct method (void Deconstructor(out param1, out param2, ...)
• any properties that are auto-created from using a positional constructor (they have get + init)

I'm surprised the Equals and GetHashCode methods didn't get included as well, but I'm fine with that.