Support withResponse() for Parse Completion

[margostino]

Confirm this is a feature request for the Node library and not the underlying OpenAI API.

• This is a feature request for the Node library

Describe the feature or improvement you're requesting

Currently for chat completion we can use withResponse() to get the parsed response data and the raw Response instance. In my case to extract headers.

This feature request is to support the same when Parse Completion is used.

I created this PR to reflect the intention of it.

Additional context

No response

[RobertCraigie]

This will be fixed in the next release! v4.59.0 #1059