Fix BalanceDuration to pass relativeTo to BalancePossiblyInfiniteDurationResult
and then pass to NanosecondsToDays.

The bug is introduced in
https://chromium-review.googlesource.com/c/v8/v8/+/3781117

The spec text in 4-a of BalancePossiblyInfiniteDuration is
"a. Let result be ? NanosecondsToDays(nanoseconds, relativeTo)."
but the code wrote
"a. Let result be ? NanosecondsToDays(nanoseconds, *undefined*)."

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

Bug: v8:11544
Change-Id: I3ea9a3b71521cdcc210e9db370d6e849fcde56ee
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3834431
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82570}