refactor: Clean up Button tests

Author: SimYunSup

src/components/Button/Button.stories.tsx

@@ -182,7 +182,7 @@ export const FullWidth: StoryObj<typeof Button> = {
   },
 };
 
-export const WithIcon: StoryObj<typeof Button> = {
+export const WithIcons: StoryObj<typeof Button> = {
   render: (args) => {
     return (
       <div className={vstack({ gap: "16" })}>

src/components/Button/Button.test.tsx

@@ -100,9 +100,6 @@ test("disabled 속성이 올바르게 적용됨", () => {
 
   expect(screen.getByRole("button", { name: "비활성화 버튼" })).toBeDisabled();
   expect(screen.getByRole("button", { name: "활성화 버튼" })).toBeEnabled();
-  expect(screen.getByRole("button", { name: "비활성화 버튼" })).toHaveClass(
-    "bg_bg.neutral.disabled!",
-  );
 });
 
 test("기본적으로 버튼이 type='button'으로 렌더링됨", () => {