Rename workspace::Restart action into workspace::Reload (#12672)

Closes https://github.com/zed-industries/zed/issues/12609

Instead of adding some ordering mechanism to the actions, rename the
action so that it's not interfering with the `editor: restart language
server` command.

Before:

![image](https://github.com/zed-industries/zed/assets/2690773/b5e86eda-d766-49fc-a25b-f8b9fdb7b521)

![image](https://github.com/zed-industries/zed/assets/2690773/c5edeb56-12aa-496b-bb6f-dc705cbb9ae3)


After:

![image](https://github.com/zed-industries/zed/assets/2690773/ed30c68d-bfdd-4e00-bb5d-0be52fbe4e16)
![Screenshot 2024-06-05 at 09 46
25](https://github.com/zed-industries/zed/assets/2690773/9fe4eb52-0399-4321-85a9-3b07c11395ce)


Release Notes:

- Improved language server restart command ergonomics by renaming
`workspace::Restart` action into `workspace::Reload` to remove any other
"restart"-worded actions in the list

crates/activity_indicator/src/activity_indicator.rs

@@ -285,10 +285,10 @@ impl ActivityIndicator {
                     icon: None,
                     message: "Click to restart and update Zed".to_string(),
                     on_click: Some(Arc::new({
-                        let restart = workspace::Restart {
+                        let reload = workspace::Reload {
                             binary_path: Some(binary_path.clone()),
                         };
-                        move |_, cx| workspace::restart(&restart, cx)
+                        move |_, cx| workspace::reload(&reload, cx)
                     })),
                 },
                 AutoUpdateStatus::Errored => Content {