Support introspecting and client codegen of deprecated arguments

[kyri-petrou]

/closes #2345

Couple of remarks:

1. I used true as the default for this option for both codegen and introspection. Should we be using false?
2. I used a class instead of case class for IntrospectionClient.Config. This is because classes are much easier to extend without breaking binary compatibility in the future. Should we care about this since it's in tools?

[ghostdogpr]

1. I used true as the default for this option for both codegen and introspection. Should we be using false?

I think it should be false to not break anything.

2. I used a class instead of case class for IntrospectionClient.Config. This is because classes are much easier to extend without breaking binary compatibility in the future. Should we care about this since it's in tools?

I know there's a caliban-mill library that uses tools, maybe some people have custom CI scripts as well. Maybe we just avoid breaking the codegen interface and it should be enough.

[ghostdogpr]

Wait, I made supportRepeatable true by default? 🤣 Let's be consistent with old me then.

[kyri-petrou]

Wait, I made supportRepeatable true by default? 🤣 Let's be consistent with old me then.

Yeah I actually had it set to false initially and changed it afterwards to be consistent 😆