Fix #24081 - lsp diagnostic code type conversion (#24347)

- **store `buffer::Diagnostic`as NumberOrString instead of assuming
String**
- **update zed-industries/lsp-types rev**

Closes #24081

Release Notes:

- Fixed an issue where language server diagnostic codes would be converted to strings leading to errors with some language servers

crates/language/src/buffer.rs

@@ -28,7 +28,7 @@ use gpui::{
     AnyElement, App, AppContext as _, Context, Entity, EventEmitter, HighlightStyle, Pixels,
     SharedString, StyledText, Task, TaskLabel, TextStyle, Window,
 };
-use lsp::LanguageServerId;
+use lsp::{LanguageServerId, NumberOrString};
 use parking_lot::Mutex;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -202,7 +202,7 @@ pub struct Diagnostic {
     /// The name of the service that produced this diagnostic.
     pub source: Option<String>,
     /// A machine-readable code that identifies this diagnostic.
-    pub code: Option<String>,
+    pub code: Option<NumberOrString>,
     /// Whether this diagnostic is a hint, warning, or error.
     pub severity: DiagnosticSeverity,
     /// The human-readable message associated with this diagnostic.