Import orchestra directly in syft/__init__.py so that tab completion works

[iamtrask]

Description

New users (and even some old users) learn about frameworks by navigating tab completion. However, one of our key noob-friendly features (orchestra) hasn't been added in a way that tab completion works. This PR tries to fix that.

Affected Dependencies

n/a

How has this been tested?

n/a

Checklist

• [x] I have followed the Contribution Guidelines and Code of Conduct
• [x] I have commented my code following the OpenMined Styleguide
• [x] I have labeled this PR with the relevant Type labels
• [x] My changes are covered by tests

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[madhavajay]

@iamtrask should we keep both or this will break the API for old notebooks and users?

[itstauq]

Closing as this issue was resolved in PR #8788