Bug 285212 – [JSC] `Intl.DurationFormat` should print negative sign for minutes after hidden hours

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[Sosuke Suzuki]

input:
```
const df = new Intl.DurationFormat('en-US', {
  style: "digital",
  hoursDisplay: "auto",
})
print(df.format({ hours: 0, minutes: -2, seconds: -3 }));
```

expected output: `-02:03`

actual output: `02:03`

[Sosuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/38404

[EWS]

Committed 288317@main (fb9e1dc79a67): <https://commits.webkit.org/288317@main>

Reviewed commits have been landed. Closing PR #38404 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/142119353>