Refactor LSP restart logic

Instead of storing `initialization_options` in every LSP adapter as
before, store previous LSP settings in `Project` entirely.

This way, we can later have use multiple different project
configurations per single LSP with its associated adapter.

co-authored-by: Max Brunsfeld <max@zed.dev>

crates/workspace/src/pane.rs

@@ -2316,6 +2316,7 @@ mod tests {
             cx.set_global(SettingsStore::test(cx));
             theme::init((), cx);
             crate::init_settings(cx);
+            Project::init_settings(cx);
         });
     }