release_version: Do not use prerelease field (#43669)

- **release_channel: Do not use prerelease channel for build id**
Prerelease channel specifiers always compare as less than to
non-prerelease, which led to 2 auto-update bugs fixed in
https://github.com/zed-industries/zed/pull/43595 and
https://github.com/zed-industries/zed/pull/43611.
We'll use a dot-delimited build specifiers in form:
release-channel.build_number.sha1 instead
- **auto_update: Do not display full build metadata in update
notification**

Release Notes:

- N/A

crates/auto_update_ui/src/auto_update_ui.rs

@@ -148,7 +148,9 @@ pub fn notify_if_app_was_updated(cx: &mut App) {
         let should_show_notification = should_show_notification.await?;
         if should_show_notification {
             cx.update(|cx| {
-                let version = updater.read(cx).current_version();
+                let mut version = updater.read(cx).current_version();
+                version.build = semver::BuildMetadata::EMPTY;
+                version.pre = semver::Prerelease::EMPTY;
                 let app_name = ReleaseChannel::global(cx).display_name();
                 show_app_notification(
                     NotificationId::unique::<UpdateNotification>(),