Updated regional default locale codes to be default

[lgunn4]

PR Summary:

Renamed regional locale keys to their default counterpart (e.g. ro-RO to ro).

Currently if a merchant adds a locale with a regional variant (ro-RO) as an alternate locale (ro), the default translations that we support out of the box does not include this locale code (we support ro not ro-RO... which is wrong)

In order to address this we are updating the root locale keys of the regional locales to their default variations.

Why are these changes introduced?

Work towards this issue: https://github.com/Shopify/store-localization/issues/4214

What approach did you take?

Renamed translation files and updated translation.yml

Other considerations

Will this impact the upgrade path for merchants ?

Visual impact on existing themes

N/A
Merchants using these locale codes as an alternate locale will now be able to see a translated storefront (out of the box translations)

Testing steps/scenarios

• Step 1

Demo links

Store:
https://logan-development-test.myshopify.com/
Password: passwordpassword

Checklist

• Added PR summary for release notes
• Requested review from UX (Only for changes that are affecting the experience or perceivable visual details)
• Created a ticket for the help.shopify.com documentation team about updates to theme settings. (Internal-only task)
• Followed theme code principles
• Linted with Theme Check
• Tested on mobile
• Tested on multiple browsers
• Tested for accessibility

[dan-menard]

Couple things we might need to check:

• The translation-platform check failed, and says to reach out to a Slack channel for assistance because you're renaming locale files. Please do this :D otherwise we might have some problems with our next translations PR.
• We should check the impact on apps here—I'll handle this, I know an internal app we can check first to get a kind of temperature check here.

[trishrempel]

The translation-platform check failed, and says to reach out to a Slack channel for assistance because you're renaming locale files. Please do this :D otherwise we might have some problems with our next translations PR.

The PR is good to go from a Translation Platform perspective, and I cleared the failing check! 👍🏻

[tyleralsbury]

Looks good. 👍