Add system_id (#18040)

This PR adds `system_id` to telemetry, which is contained within a new
`global` database (accessible by any release channel of Zed on a single
system). This will help us get a more accurate understanding of user
count, instead of relying on `installationd_id`, which is different per
release channel. This doesn't solve the problem of a user with multiple
machines, but it gets us closer.

Release Notes:

- N/A

crates/feedback/src/feedback_modal.rs

@@ -44,8 +44,8 @@ const FEEDBACK_SUBMISSION_ERROR_TEXT: &str =
 struct FeedbackRequestBody<'a> {
     feedback_text: &'a str,
     email: Option<String>,
-    metrics_id: Option<Arc<str>>,
     installation_id: Option<Arc<str>>,
+    metrics_id: Option<Arc<str>>,
     system_specs: SystemSpecs,
     is_staff: bool,
 }
@@ -296,16 +296,16 @@ impl FeedbackModal {
         }
 
         let telemetry = zed_client.telemetry();
-        let metrics_id = telemetry.metrics_id();
         let installation_id = telemetry.installation_id();
+        let metrics_id = telemetry.metrics_id();
         let is_staff = telemetry.is_staff();
         let http_client = zed_client.http_client();
         let feedback_endpoint = http_client.build_url("/api/feedback");
         let request = FeedbackRequestBody {
             feedback_text,
             email,
-            metrics_id,
             installation_id,
+            metrics_id,
             system_specs,
             is_staff: is_staff.unwrap_or(false),
         };