fix(rust): qualify world-owned type paths in future/stream payload vtables#1601

alexcrichton merged 3 commits intobytecodealliance:mainbytecodealliance/wit-bindgen:mainfrom

mattwilkinsonn:fix-future-result-use-qualificationmattwilkinsonn/wit-bindgen:fix-future-result-use-qualificationCopy head branch name to clipboard