Nested domains cypress test

[kkorchak]

Test steps:

1. create a new domain without a parent
2. ensure the new domain has no parent in the navigation sidebar
3. move a domain from the root level to be under a parent
4. ensure it is no longer on the sidebar navigator at the top level but shows up under the parent
5. move a domain from under a parent domain to the root level
6. delete a domain
7. ensure the domain is no longer in the sidebar navigator

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

[chriscollins3456]

nice I like this test for sure! just going back to what i've said on other PRs, could we rely a little more heavily on test IDs instead of text or where things are located in the dom? i'm just concerned about creating tests that fail unnecessarily in the future