ECMA-402 PR Coverage: Add dayPeriod option

[sffc]

Spec PR: tc39/ecma402#346

According to tc39/ecma402#346 (comment) and the meeting minutes, there are partial tests added in #2194 and #2217. Please verify if additional tests need to be added.

@FrankYFTang

[caiolima]

I think we have enough coverage to consider this complete. Missing tests are potentially edge-cases.