This allows for a more graceful error message for the case of users who need to update their volume path.
I tested this with 17 and `--env PGDATA=/var/lib/postgresql/17/docker` (to make sure it still works fine and doesn't complain about the extra volume provided by Docker/`VOLUME`) and 18 with `-v /var/lib/postgresql/data` (where it appropriately errors and explains to me what I should be doing instead).
I also did a reflow on some text in the error message that's designed to fit in 80 columns but was taking 81. 😂
This is a bit complicated to use in Docker (because `io_uring` has a long and storied security story), but it is a new feature of 18+ that we should probably explicitly support for users who want to jump through the hoops to use it despite the security risk.
Additionally, this re-alphabetizes our `--with-xxx` flags.
Tianon Gravi