Deduplicate nix dependency versions (#12307)

# Description
Now we only use `nix 0.28.0`

Achieved by
- updating `ctrlc` to `3.4.4`
- updating `wl-clipboard-rs` to `0.8.1`
- update our own dependency on `nix` from `0.27` to `0.28`
  - required fixing uses of `nix::unistd::{tcgetpgrp,tcsetpgrp}`
  - now requires an I/O safe file descriptor
  - fake one pointing to `libc::STDIN_FILENO` (we were only accessing
`0` previously, dito for fish)


# User-Facing Changes
Better compile times and less to download as source dependencies

src/terminal.rs

@@ -57,7 +57,7 @@ pub(crate) fn acquire(interactive: bool) {
             }
         }
         // Set our possibly new pgid to be in control of terminal
-        let _ = unistd::tcsetpgrp(libc::STDIN_FILENO, shell_pgid);
+        let _ = unistd::tcsetpgrp(unsafe { nu_system::stdin_fd() }, shell_pgid);
     }
 }
 
@@ -66,7 +66,7 @@ pub(crate) fn acquire(interactive: bool) {
 fn take_control() -> Pid {
     let shell_pgid = unistd::getpgrp();
 
-    match unistd::tcgetpgrp(nix::libc::STDIN_FILENO) {
+    match unistd::tcgetpgrp(unsafe { nu_system::stdin_fd() }) {
         Ok(owner_pgid) if owner_pgid == shell_pgid => {
             // Common case, nothing to do
             return owner_pgid;
@@ -91,14 +91,14 @@ fn take_control() -> Pid {
     }
 
     for _ in 0..4096 {
-        match unistd::tcgetpgrp(libc::STDIN_FILENO) {
+        match unistd::tcgetpgrp(unsafe { nu_system::stdin_fd() }) {
             Ok(owner_pgid) if owner_pgid == shell_pgid => {
                 // success
                 return owner_pgid;
             }
             Ok(owner_pgid) if owner_pgid == Pid::from_raw(0) => {
                 // Zero basically means something like "not owned" and we can just take it
-                let _ = unistd::tcsetpgrp(libc::STDIN_FILENO, shell_pgid);
+                let _ = unistd::tcsetpgrp(unsafe { nu_system::stdin_fd() }, shell_pgid);
             }
             Err(Errno::ENOTTY) => {
                 eprintln!("ERROR: no TTY for interactive shell");
@@ -123,7 +123,7 @@ extern "C" fn restore_terminal() {
     // `tcsetpgrp` and `getpgrp` are async-signal-safe
     let initial_pgid = Pid::from_raw(INITIAL_PGID.load(Ordering::Relaxed));
     if initial_pgid.as_raw() > 0 && initial_pgid != unistd::getpgrp() {
-        let _ = unistd::tcsetpgrp(libc::STDIN_FILENO, initial_pgid);
+        let _ = unistd::tcsetpgrp(unsafe { nu_system::stdin_fd() }, initial_pgid);
     }
 }