Closes #1679.

Adds the field/option names used by Intl.DurationFormat, Intl.DateTimeFormat, and Intl.RelativeTimeFormat to tools/domprops.js, so mangle.properties doesn't silently break code like:

new Intl.DurationFormat('en').format({ hours: 1, minutes: 30 });
new Intl.DateTimeFormat('en', { timeZoneName: 'short' }).formatToParts(new Date());
new Intl.RelativeTimeFormat('en', { numeric: 'auto' }).format(-1, 'day');

Sibling change to #1652, which added Temporal, Duration, and DurationFormat class names but not their record/option fields. The singular forms (year, month, day, hour, minute, second) also cover Temporal record fields.

29 entries total, alphabetically merged into the existing list:

• DurationFormat: years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds
• DateTimeFormat: weekday, era, year, month, day, dayPeriod, hour, minute, second, fractionalSecondDigits, hour12, hourCycle, dateStyle, timeStyle, timeZone, timeZoneName, calendar, numberingSystem
• RelativeTimeFormat: numeric

npm test (246 passing), npm run lint, and npm run ls-lint all pass.