Add Exported::AppendSerialized (consistency with Serialized interface).
Deprecate Exported::writeBinary.

Upstream PRs:
https://chromium-review.googlesource.com/c/deps/inspector_protocol/+/1958506
https://chromium-review.googlesource.com/c/deps/inspector_protocol/+/1941035

Change-Id: I50d6db05ea7c1336022b0b63e5ec2c69488ab525
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1958575Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Johannes Henkel <johannes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65436}