[roll] Roll fuchsia [fidl][rust] Migrate resource results to new types

This CL migrates response sending to the new parameter types when the
top level response is a resource struct with error syntax.

This means when you call responder.send(...), you pass a Result instead
of &mut Result, and the Ok type is consistent with other parameter types
rather than being a tuple of owned types. For example:

    Before                               After
    ===================================  ==========================
    r.send(&mut Ok(vmo))                 r.send(Ok(vmo))
    -----------------------------------  --------------------------
    r.send(&mut Ok(                      r.send(Ok(
      Some(Box::new(resource_struct))))    Some(resource_struct)))
    -----------------------------------  --------------------------
    r.send(&mut Ok(                      r.send(Ok(("hi", handle)))
      ("hi".to_owned(), handle)))
    -----------------------------------  --------------------------
    r.send(&mut Err(123))                r.send(Err(123))
    -----------------------------------  --------------------------

This is a continuation of I1a8ace070e08ea3512a8d30dd2b2b8b23ee511f7
which migrated top-level table and union responses. The final step after
this will be migrated responses that use value structs.

Test: fx check-goldens fidlgen_rust
Test: fx build tools/fidl/fidlgen_rust:goldens
Original-Bug: 54368, 118880
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/857185
Original-Revision: 43cd68241e726afa4c9103b68799cd3073e134ad
GitOrigin-RevId: 974ba76a436ba143c5312e4b0f710504b161d66a
Change-Id: Ia88e9f4d0094e0bf4e95a19dd51e6f5b72e784f3