Remove netcat dependency (#28920)

Closes #28813
Closes #27749

Release Notes:

- Removed the need to have openbsd `netcat` (`nc`) installed on your
system in order to enter passwords for `git` or `ssh` (remote
development). If you previously installed `netcat` specifically for Zed,
you may uninstall it.

script/linux

@@ -38,7 +38,6 @@ if [[ -n $apt ]]; then
     cmake
     clang
     jq
-    netcat-openbsd
     git
     curl
     gettext-base
@@ -88,14 +87,12 @@ if [[ -n $dnf ]] || [[ -n $yum ]]; then
     tar
   )
   # perl used for building openssl-sys crate. See: https://docs.rs/openssl/latest/openssl/
-  # openbsd-netcat is unavailable in RHEL8/9 (and nmap-ncat doesn't support sockets)
   if grep -qP '^ID="?(fedora)' /etc/os-release; then
     deps+=(
       perl-FindBin
       perl-IPC-Cmd
       perl-File-Compare
       perl-File-Copy
-      netcat
       mold
     )
   elif grep -qP '^ID="?(rhel|rocky|alma|centos|ol)' /etc/os-release; then
@@ -152,7 +149,6 @@ if [[ -n $zyp ]]; then
     libzstd-devel
     make
     mold
-    netcat-openbsd
     openssl-devel
     sqlite3-devel
     tar
@@ -179,7 +175,6 @@ if [[ -n $pacman ]]; then
     libgit2
     libxcb
     libxkbcommon-x11
-    openbsd-netcat
     openssl
     zstd
     pkgconf
@@ -209,7 +204,6 @@ if [[ -n $xbps ]]; then
     libxcb-devel
     libxkbcommon-devel
     libzstd-devel
-    openbsd-netcat
     openssl-devel
     wayland-devel
     vulkan-loader
@@ -234,7 +228,6 @@ if [[ -n $emerge ]]; then
     media-libs/alsa-lib
     media-libs/fontconfig
     media-libs/vulkan-loader
-    net-analyzer/openbsd-netcat
     x11-libs/libxcb
     x11-libs/libxkbcommon
     sys-devel/mold