We can do this update now that `lucet-runtime-internals` no longer pins the
`getrandom` crate version; the conflicts around spinlocks have been removed
and the new version of `getrandom` brings in an important fix for calling
`SYS_getrandom` on some architectures.
Depends on D85409
Differential Revision: https://phabricator.services.mozilla.com/D85410
Nathan Froyd