Use SNPrintf to handle bigger unit duration fields.

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal-temporaldurationtostring

Fix test:
https://github.com/tc39/test262/blob/main/test/built-ins/Temporal/Duration/prototype/toString/precision-formatted-as-decimal-number.js

Bug: v8:11544
Change-Id: I63a6e823652a0826216593cd153ef5103f94e7a9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3834437Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82573}