This requires FormDataLoader.
Not high priority, since FormData encoded Wasm would be very likely not-compilable.
<rdar://problem/74132453>
Pull request: https://github.com/WebKit/WebKit/pull/3261
Committed 253395@main (e2b279112b8d): <https://commits.webkit.org/253395@main> Reviewed commits have been landed. Closing PR #3261 and removing active labels.