Add audience to translation.yml

[mattellig]

Part of https://github.com/Shopify/translation-platform/issues/1638

Adding the audience config to any components where it's not set, so that Translation Platform can remove this repository from a list of internal hardcoded audience values.

[translation-platform]

This PR changes one or more translation configuration files, or at least they look like translation configuration files. Please make sure you know what you're doing!

• Read the docs on this config file here.
• If you have any questions or need a hand, reach out to us on Slack at #help-localization.
• If this change involves moving a large number of files, please do not merge it without consulting us.

Files added or modified:

• translation.yml

Pinging @Shopify/translation-tooling for awareness.

[lizkenyon]

TY