Redox builder is temporarily disabled

[gnzlbg]

#61393 temporarily disables the redox builder, this issue tracks re-enabling it.

cc @jackpot51

[josephlr]

libc has released a new version, so @newpavlov's change #63452 can be resubmitted.

[newpavlov]

IIUC it would also require updating Cargo.lock.