Add feature flag mapping for 'Intl.Locale-info' tests

Map 'Intl.Locale-info' to '--harmony_intl_locale_info',
To be ready for https://github.com/tc39/test262/pull/2987

Bug: v8:11638
Change-Id: I119068612867648de30f63aa64c3c2bc5d63e50b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2893824
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74577}

test/test262/testcfg.py

@@ -45,6 +45,7 @@ from testrunner.outproc import test262
 # TODO(littledan): move the flag mapping into the status file
 FEATURE_FLAGS = {
   'Intl.DateTimeFormat-dayPeriod': '--harmony-intl-dateformat-day-period',
+  'Intl.Locale-info': '--harmony_intl_locale_info',
   'Symbol.prototype.description': '--harmony-symbol-description',
   'FinalizationRegistry': '--harmony-weak-refs-with-cleanup-some',
   'WeakRef': '--harmony-weak-refs-with-cleanup-some',