rust: Run rustfmt with some experimental options

+ Sort and group the imports
+ Normalize and format comments (100 characters width)

Command used:

$ cargo +nightly fmt --

Acked-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Marc Hartmayer <marc@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

rust/pvebc/src/ebc_utils.rs

@@ -2,9 +2,11 @@
 //
 // Copyright IBM Corp.
 
+use std::io::Read;
+use std::path::Path;
+
 use anyhow::{bail, Context, Result};
 use pv_core::misc::open_file;
-use std::{io::Read, path::Path};
 
 /// Length of the MAC tag in bytes (last 16 bytes of AddSecretRequest files)
 pub const MAC_TAG_LEN: usize = 16;