[Dashboard] Remove millisecond padding in DurationText component (#52395)

Signed-off-by: chuang0221 <chuangellow@gmail.com>

Author: chuang0221

python/ray/dashboard/client/src/common/DurationText/DurationText.component.test.tsx

@@ -13,11 +13,11 @@ describe("DurationText", () => {
     rerender(
       <DurationText startTime={new Date(100000)} endTime={new Date(105000)} />,
     );
-    expect(await screen.findByText("5s 000ms")).toBeInTheDocument();
+    expect(await screen.findByText("5s 0ms")).toBeInTheDocument();
     rerender(
       <DurationText startTime={new Date(100000)} endTime={new Date(110000)} />,
     );
-    expect(await screen.findByText("10s 000ms")).toBeInTheDocument();
+    expect(await screen.findByText("10s 0ms")).toBeInTheDocument();
     rerender(
       <DurationText startTime={new Date(100000)} endTime={new Date(200000)} />,
     );
@@ -69,13 +69,13 @@ describe("DurationText", () => {
 
     MockDate.set(mockDate1);
     const { rerender } = render(<DurationText startTime={startTime} />);
-    expect(await screen.findByText("5s 000ms")).toBeInTheDocument();
+    expect(await screen.findByText("5s 0ms")).toBeInTheDocument();
 
     MockDate.set(mockDate2);
     act(() => {
       jest.advanceTimersByTime(1000);
     });
-    expect(await screen.findByText("6s 000ms")).toBeInTheDocument();
+    expect(await screen.findByText("6s 0ms")).toBeInTheDocument();
 
     MockDate.set(mockDate3);
     act(() => {

python/ray/dashboard/client/src/common/DurationText/DurationText.tsx

@@ -28,9 +28,10 @@ export const DurationText = ({ startTime, endTime }: DurationTextProps) => {
   let durationText: string;
   let refreshInterval = 1000;
   if (duration.asSeconds() < 1) {
-    durationText = duration.format("SSS[ms]");
+    durationText = duration.milliseconds() + "ms";
   } else if (duration.asMinutes() < 1) {
-    durationText = duration.format("s[s] SSS[ms]");
+    durationText =
+      duration.format("s[s]") + " " + duration.milliseconds() + "ms";
   } else if (duration.asHours() < 1) {
     durationText = duration.format("m[m] s[s]");
   } else if (duration.asDays() < 1) {