ui: Update Label component (#24653)

- Standardize style methods
- Convert label story to a component preview
- update component preview styles  

Release Notes:

- N/A

crates/ui/src/components/stories.rs

@@ -8,7 +8,6 @@ mod disclosure;
 mod icon;
 mod icon_button;
 mod keybinding;
-mod label;
 mod list;
 mod list_header;
 mod list_item;
@@ -23,7 +22,6 @@ pub use disclosure::*;
 pub use icon::*;
 pub use icon_button::*;
 pub use keybinding::*;
-pub use label::*;
 pub use list::*;
 pub use list_header::*;
 pub use list_item::*;