Add gateway location tests

[asmulko]

Summary

References #3606

Changes

• Added gateway location e2e tests

Checklist

• Scope: The referenced issue is addressed, there are no unrelated changes.
• Compatibility: The changes are backwards compatible with existing API, storage, configuration and CLI, according to the compatibility commitments in README.md for the chosen target branch.
• Documentation: Relevant documentation is added or updated.
• Changelog: Significant features, behavior changes, deprecations and fixes are added to CHANGELOG.md.
• Commits: Commit messages follow guidelines in CONTRIBUTING.md, there are no fixup commits left.

[kschiffer]

Can you add a test that checks whether the location can be set by clicking into the map? This should be possible by selecting the map widget and using the .click() method. Note that you can use this method with coordinates.

[asmulko]

Can you add a test that checks whether the location can be set by clicking into the map? This should be possible by selecting the map widget and using the .click() method. Note that you can use this method with coordinates.

Thanks for the information on how to do it, I've added the test