LibWeb: Implement transfer for Resizable/ArrayBuffer #2547
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Implement transfer logic for ArrayBuffer and ResizableArrayBuffer.
Change TransferDataHolder data type to Vector to reuse existing
serialization infrastructure.
Fix 5 WPT tests in
safe-passing-of-structured-data/window-postmessage.window.html
that are related to transport, as well as
LibWeb/Text/input/Worker/Worker-postMessage-transfer.html
.The latter is currently ignored due to flakiness in CI, so no rebaseline is
needed.
During serialization with transfer, initialize memory with known index
and initialize Serializer at position that dependent on the memory.
This is mandatory to make ArrayBuffer transport to work. It also happens
to fix 4 WPT tests, that are related to curcular references during
serialization.