Use Instant not chrono for telemetry (#20756)

We occasionally see dates in the future appearing in our telemetry. One
hypothesis is that this is caused by a clock change while Zed is running
causing date math based on chrono to be incorrect.

Instant *should* be a more stable source of relative timestamps.

Release Notes:

- N/A

crates/project/src/project.rs

@@ -1133,7 +1133,7 @@ impl Project {
 
         let fs = Arc::new(RealFs::default());
         let languages = LanguageRegistry::test(cx.background_executor().clone());
-        let clock = Arc::new(FakeSystemClock::default());
+        let clock = Arc::new(FakeSystemClock::new());
         let http_client = http_client::FakeHttpClient::with_404_response();
         let client = cx
             .update(|cx| client::Client::new(clock, http_client.clone(), cx))
@@ -1179,7 +1179,7 @@ impl Project {
         use gpui::Context;
 
         let languages = LanguageRegistry::test(cx.executor());
-        let clock = Arc::new(FakeSystemClock::default());
+        let clock = Arc::new(FakeSystemClock::new());
         let http_client = http_client::FakeHttpClient::with_404_response();
         let client = cx.update(|cx| client::Client::new(clock, http_client.clone(), cx));
         let user_store = cx.new_model(|cx| UserStore::new(client.clone(), cx));