The Cargo.lock file is not included in the master branch but it is
currently added for the releases (e.g. [0]). Since the GitHub deploy
action currently fails for other reasons [1] we should use the
Cargo.lock from the repository instead.
[0]: 80573d2bf7
[1]: https://github.com/xiph/rav1e/issues/2373
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.
