CLDR-14571 generate cldr-bcp47 data

[nordzilla]

CLDR-14571

• This PR completes the ticket.

Generates bcp47 data for cldr-json.

This depends on unicode-org/cldr#1459

[sffc]

Do you need to add the new JSON files to the repo, or is that a separate step?

[nordzilla]

@sffc

Do you need to add the new JSON files to the repo, or is that a separate step?

I don't believe so. We are still ironing out the details of the directory structure and generation on unicode-org/cldr#1459, but @srl295 said, "I’ll be producing the cldr-json data as a matter of course, pretty soon. So you don’t need to do anything else there."

[srl295]

LGTM but let's wait until the dependent lands

[srl295]

Do you need to add the new JSON files to the repo, or is that a separate step?

They'll be picked up when I generate candidate data from the CLDR alpha data.