update future/stream ABIs and names

This updates `wasmtime-environ`, `wasmtime-cranelift`, and `wasmtime` to to use
(some of) the new ABI defined in
WebAssembly/component-model#524.  It covers everything
in that PR _except_ the lifting and lowering changes to `future.{read,write}`,
which we decided are more trouble than they're worth.

Still to do: add tests for the following items (Luke has volunteered to do this):

> * When a `future` is "done" (by a `COMPLETED` read/write or by the writable end receiving `DROPPED`), the only valid operation is `future.drop-{readable,writable}`.  `future.{read,write}` or lifting traps.
> * Because there's no great reason for streams to be more permissive than futures in this regard, streams are also given a "done" state with the same trapping rules as futures, but the stream "done" state is only set when `DROPPED` is received.

Signed-off-by: Joel Dice <[email protected]>

Author: dicej