E2E Claude tests (#34702)

- **Fix cancellation of tool calls**
- **Make tool_call test more resilient**
- **Fix tool call confirmation test**

Release Notes:

- N/A

crates/agent_servers/Cargo.toml

@@ -33,6 +33,7 @@ serde.workspace = true
 serde_json.workspace = true
 settings.workspace = true
 smol.workspace = true
+strum.workspace = true
 tempfile.workspace = true
 ui.workspace = true
 util.workspace = true