Add Cypress values to RegionSelect, CountrySelect

[stephanieharrison-maximus]

Please check if the PR fulfills these requirements:

• After these changes, the app was run and still works as expected
• [] Tests for these changes were added (if applicable)
• All existing unit tests were run and still pass

Please specify the type of change this PR introduces (Bug fix, feature addition, content update, chore, etc.):

Adds data-cy values to the RegionSelect and CountrySelect components for Cypress testing.

Additional Notes:

I didn't add tests due to the minor-ness of the change, but I can if desired.

[bryce-mcmath]

Looks good. When you're done and you've published a patch version, please checkout the v3 branch and merge main into it, then fix the conflicts if there are any and publish an alpha version of the v3 branch

(to keep v3 up to date with the main version)

[cyrilbravo]

Changes looks good. Approved :)

[bryce-mcmath]

Looks good! Thanks for fixing that

[cyrilbravo]

The new commits looks good. Nice job!