Includes some bugfixes/cleanups to the scripts and packaging, a run of the
updater, a bump of the version, an upgrade to the newer cargo fetcher in #79975,
and gets the web assembly portion to compile successfully.
Fixes#75863
Changes the default fetcher in the Rust Platform to be the newer
`fetchCargoTarball`, and changes every application using the current default to
instead opt out.
This commit does not change any hashes or cause any rebuilds. Once integrated,
we will start deleting the opt-outs and recomputing hashes.
See #79975 for details.
