Decrease fetchLocale timeout

Getting locale has the same timeout as mocha so mocha also times out with locale

Bug: None
No-Presubmit: True
No-Tree-Checks: True
No-Try: True
Change-Id: I1b2e6462ef330a0839da0130d2ef714ef5f6e7b6
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7021831
Reviewed-by: Nikolay Vitkov <nvitkov@chromium.org>
Commit-Queue: Alina Varkki <alinavarkki@chromium.org>

Author: AlinaVarkki

front_end/core/i18n/i18nImpl.ts

@@ -68,7 +68,7 @@ export async function fetchAndRegisterLocaleData(
     locale: Intl.UnicodeBCP47LocaleIdentifier, location = self.location.toString()): Promise<void> {
   const localeDataTextPromise = fetch(getLocaleFetchUrl(locale, location)).then(result => result.json());
   const timeoutPromise =
-      new Promise<never>((_, reject) => window.setTimeout(() => reject(new Error('timed out fetching locale')), 5000));
+      new Promise<never>((_, reject) => window.setTimeout(() => reject(new Error('timed out fetching locale')), 2500));
   const localeData = await Promise.race([timeoutPromise, localeDataTextPromise]);
   i18nInstance.registerLocaleData(locale, localeData);
 }