Add `ToImmutableArrayAsync` in addition to `ToArrayAsync`

[xperiandri]

Is your feature request related to a problem? Please describe. We need to have ImmutableArray as output but preferably without an unnecessary allocation of an array.

Describe the solution you'd like Add ToImmutableArrayAsync methods in addition to ToArrayAsync

Describe alternatives you've considered Convert array to ImmutableArray with unnecessary allocation

Consider sponsoring me I can contribute the feature if you approve

[danielcweber]

There is always ToAsyncEnumerable on any query, which you can do anything with (ToImmutableArray should be available in either System.Linq.Async or System.Interactive.Async). It's an easy extension method, I'm not sure it should go into the main library.

[xperiandri]

Sounds great, thanks!

[xperiandri]

@danielcweber I've also discovered that awaiting IValueGremlinQuery returns an array How can I return ImmutableArray here?

[danielcweber]

Closing. The feature can easily be added by an extension method.