block: Remove raw_disk compat alias

Update external consumers and internal test modules to use
formats::raw instead of the raw_disk alias, then remove the
re-export from lib.rs.

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>

block/src/lib.rs

@@ -28,7 +28,6 @@ use std::str::FromStr;
 use std::{cmp, mem, result};
 
 pub use formats::qcow::internal as qcow;
-pub use formats::raw as raw_disk;
 pub use formats::vhdx::internal as vhdx;
 #[cfg(feature = "io_uring")]
 use io_uring::{IoUring, Probe, opcode};