Update Pinpoint supported countries

[zachmargolis]

Related to #11772, I ran the requisite updating.

I made this a separate PR just in case there were countries we didn't want to enable due to shortcodes, agreements, etc

[mitchellhenke]

How many of these are due to footnote changes/additions on the page? It looks like the Registration required¹ has changed and there are some additional footnotes added. We'll probably want to better understand what those changes mean before applying any support changes here.

Current page: https://docs.aws.amazon.com/sms-voice/latest/userguide/phone-numbers-sms-by-country.html
Older page (via the Internet Archive): https://web.archive.org/web/20240306205730/https://docs.aws.amazon.com/sms-voice/latest/userguide/phone-numbers-sms-by-country.html

[zachmargolis]

How many of these are due to footnote changes/additions on the page? It looks like the Registration required1 has changed and there are some additional footnotes added. We'll probably want to better understand what those changes mean before applying any support changes here.

yeah looks like we need to add support to our code to handle for Registration required^9