Rollup merge of #130209 - GrigorenkoPV:CrossesDevices, r=dtolnay

Stabilize `std::io::ErrorKind::CrossesDevices`

FCP in #130191

cc #86442

See #130191 for more info and a recap of what has happened up until now.

TLDR: This had been FCP'd in December 2022 with some other `ErrorKind`s, but the stabilization got postponed due to some concerns voiced about several of the variants. However, the only concern ever voiced for this variant in particular was a wish to rename this to `NotSameDevice` analogous to Windows's `ERROR_NOT_SAME_DEVICE` (as opposed to Unix's `EXDEV`). This suggestion did not receive any support. So let's try to FCP this as is.

r? libs-api

library/std/src/io/error.rs

@@ -364,7 +364,7 @@ pub enum ErrorKind {
     #[stable(feature = "io_error_a_bit_more", since = "1.83.0")]
     Deadlock,
     /// Cross-device or cross-filesystem (hard) link or rename.
-    #[unstable(feature = "io_error_more", issue = "86442")]
+    #[stable(feature = "io_error_crosses_devices", since = "CURRENT_RUSTC_VERSION")]
     CrossesDevices,
     /// Too many (hard) links to the same filesystem object.
     ///