Handle canonical options when translating `task.return`

[alexcrichton]

I'm about to commit code in #10314 where the new canonical options specified on task.return, now present after a wasmparser update, are going to be ignored during compilation of the trampoline. This should not be ignored though and we'll have to do something with that in the runtime.

[alexcrichton]

This is done now upstream in the p3 repository and will make its way here in due time.