Use WTF::map() in `ScriptArguments::getArgumentsAsStrings()` instead of `uncheckedAppend()`. It is more efficient, now that `uncheckedAppend()` is just an alias to `append()`.
Pull request: https://github.com/WebKit/WebKit/pull/18527
Committed 268793@main (9152805b2bb4): <https://commits.webkit.org/268793@main> Reviewed commits have been landed. Closing PR #18527 and removing active labels.
<rdar://problem/116411442>