Rollup merge of #128539 - biabbas:deny_unsafe, r=workingjubilee

Forbid unused unsafe in vxworks-specific std modules

Tracking issue #127747
Adding deny(unsafe_op_in_unsafe_fn) in VxWorks specific files did not cause any error.
Most of VxWorks falls back on Unix libraries. So we'll have to wait for Unix changes.

r? ```@workingjubilee```

library/std/src/os/vxworks/mod.rs

@@ -1,6 +1,7 @@
 //! VxWorks-specific definitions
 
 #![stable(feature = "raw_ext", since = "1.1.0")]
+#![forbid(unsafe_op_in_unsafe_fn)]
 
 pub mod fs;
 pub mod raw;