Respect completion resolve server capabilities (#2858)

Only query for additional edits if the server supports it

Release Notes:

- N/A

crates/collab/src/tests/integration_tests.rs

@@ -4163,6 +4163,7 @@ async fn test_collaborating_with_completion(
             capabilities: lsp::ServerCapabilities {
                 completion_provider: Some(lsp::CompletionOptions {
                     trigger_characters: Some(vec![".".to_string()]),
+                    resolve_provider: Some(true),
                     ..Default::default()
                 }),
                 ..Default::default()

crates/editor/src/editor_tests.rs

@@ -5237,6 +5237,7 @@ async fn test_completion(cx: &mut gpui::TestAppContext) {
         lsp::ServerCapabilities {
             completion_provider: Some(lsp::CompletionOptions {
                 trigger_characters: Some(vec![".".to_string(), ":".to_string()]),
+                resolve_provider: Some(true),
                 ..Default::default()
             }),
             ..Default::default()
@@ -7528,6 +7529,7 @@ async fn test_completions_with_additional_edits(cx: &mut gpui::TestAppContext) {
         lsp::ServerCapabilities {
             completion_provider: Some(lsp::CompletionOptions {
                 trigger_characters: Some(vec![".".to_string()]),
+                resolve_provider: Some(true),
                 ..Default::default()
             }),
             ..Default::default()

crates/project/src/project.rs

@@ -4454,10 +4454,20 @@ impl Project {
             };
 
             cx.spawn(|this, mut cx| async move {
-                let additional_text_edits = lang_server
+                let can_resolve = lang_server
-                    .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
+                    .capabilities()
-                    .await?
+                    .completion_provider
-                    .additional_text_edits;
+                    .as_ref()
+                    .and_then(|options| options.resolve_provider)
+                    .unwrap_or(false);
+                let additional_text_edits = if can_resolve {
+                    lang_server
+                        .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
+                        .await?
+                        .additional_text_edits
+                } else {
+                    completion.lsp_completion.additional_text_edits
+                };
                 if let Some(edits) = additional_text_edits {
                     let edits = this
                         .update(&mut cx, |this, cx| {