testing/tty-share: upgrade to 2.4.0

Also enable riscv64 support again.

See: https://github.com/elisescu/tty-share/issues/40#issuecomment-1327547227
9 jobs for !41736 with tty-share-2.4.0 in 2 minutes and 54 seconds (queued for 3 seconds)
merge request