FIO-7208: Moved Tree component to the contrib library

[alexandraRamanenka]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-7208

Dependencies

This PR depends on the following PRs from other Form.io modules: ...

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above

[lane-formio]

Can you please resolve failing tests?

[alexandraRamanenka]

All the tests are passing locall, so I'm trying to figure out what's the reason of a failing test here

[travist]

👍