Implement a zero copy tzdb provider

[nekevss]

This PR implements the bulk of the logic from the initial PR to create a zero copy tzdb provider.

A couple notes:

• Some of the logic is duplicated from the CompiledTzdbProvider and FsTzdbProvider (although, there is hopefully room to consolidate this in future PRs)
• This has been run locally on Boa and there was no major regressions with maybe one or two additional failures in the intl402 suite.