linux: Name desktop file correctly during bundle (#45508)

Closes #45507

There have been 5+ PRs attempting to fix Linux desktop icon association
by adding `StartupWMClass` back to the `.desktop.in` template (#15763,
#20644, #23459, #33019, #37962), all closed because `StartupWMClass` is
an X11-specific key that GNOME happens to misuse on Wayland, and the
correct fix per the FreeDesktop spec is to name the `.desktop` file to
match the app's Wayland `app_id` / X11 `WM_CLASS`. Refer:
https://github.com/zed-industries/zed/issues/12707#issuecomment-2168742761

The root cause is that `bundle-linux` was never updated to produce the
correct filename in the tarball. The only consumers of the tarball's
desktop file are `install.sh` and manual extractors. So this fix is for
people who download the tarball and extract it without `install.sh`. The
docs already tell them to rename, but as @wcbing points out, not
everyone reads that carefully.

We are now making `bundle-linux` produce the correctly named desktop
file from the start.

Release Notes:

- N/A

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

script/bundle-linux

@@ -164,17 +164,21 @@ export APP_ICON="zed"
 export APP_ARGS="%U"
 if [[ "$channel" == "preview" ]]; then
   export APP_NAME="Zed Preview"
+  APP_ID="dev.zed.Zed-Preview"
 elif [[ "$channel" == "nightly" ]]; then
   export APP_NAME="Zed Nightly"
+  APP_ID="dev.zed.Zed-Nightly"
 elif [[ "$channel" == "dev" ]]; then
   export APP_NAME="Zed Devel"
+  APP_ID="dev.zed.Zed-Dev"
 else
   export APP_NAME="Zed"
+  APP_ID="dev.zed.Zed"
 fi
 
 mkdir -p "${zed_dir}/share/applications"
-envsubst < "crates/zed/resources/zed.desktop.in" > "${zed_dir}/share/applications/zed$suffix.desktop"
-chmod +x "${zed_dir}/share/applications/zed$suffix.desktop"
+envsubst < "crates/zed/resources/zed.desktop.in" > "${zed_dir}/share/applications/$APP_ID.desktop"
+chmod +x "${zed_dir}/share/applications/$APP_ID.desktop"
 
 # Copy generated licenses so they'll end up in archive too
 cp "assets/licenses.md" "${zed_dir}/licenses.md"