debugger: Add args argument to debugger launch config (#27953)

This also fixes a bug where debug cargo test code actions would debug
all tests in a mod instead of a specific test

Release Notes:

- N/A

crates/languages/src/rust.rs

@@ -729,7 +729,12 @@ impl ContextProvider for RustContextProvider {
                 ..TaskTemplate::default()
             },
             TaskTemplate {
-                label: "Debug".into(),
+                label: format!(
+                    "Debug {} {} (package: {})",
+                    RUST_BIN_KIND_TASK_VARIABLE.template_value(),
+                    RUST_BIN_NAME_TASK_VARIABLE.template_value(),
+                    RUST_PACKAGE_TASK_VARIABLE.template_value(),
+                ),
                 cwd: Some("$ZED_DIRNAME".to_owned()),
                 command: "cargo".into(),
                 task_type: TaskType::Debug(task::DebugArgs {