miri no longer builds after rust-lang/rust#70343

[rust-highfive]

Hello, this is your friendly neighborhood mergebot.
After merging PR #70343, I observed that the tool miri no longer builds.
A follow-up PR to the repository https://github.com/rust-lang/miri is needed to fix the fallout.

cc @Centril, do you think you would have time to do the follow-up work?
If so, that would be great!

And nominating for compiler team prioritization.

[spastorino]

Removing nomination, as part of pre-triage we are looking anyways into tool breakage.