fix: use region-helper instead of hardcoded region functions

[BibiSebi]

Issue:

What?

This PR includes using the new region-helper instead of hardcoded logic.

Why?

EXT-2122

How to test? (optional)

1. run yarn build
2. run yarn pack
3. copy-paste the packed file (package.tgz) to your space/tool plugin
4. adapt package.json to use the local dependency from the packed file (e.g.: @storyblok/app-extension-auth: "file:./../your-desintation/package.tgz")
5. test the space/tool plugin in different regions (us)

[BibiSebi]

will this be a patch version update or a minor?

[demetriusfeijoo]

will this be a patch version update or a minor?

Hey @BibiSebi, in my opinion, we may go with a minor here since this PR not only replaced the hardcoded we have with the region-helper but also enabled new regions.

What do you think? 🤔

[eunjae-lee]

looks great to me ! 🎉

btw, this is a patch release.

minor release is only when you "add" a functionality.

Minor version Y (x.Y.z | x > 0) MUST be incremented if new, backward compatible functionality is introduced to the public API

https://semver.org/

[BibiSebi]

ok I will go with the minor then as it adds new functionality in sense of having the possibility to reach multiple new regions