[Databoxedge] new extension: support for data-box-edge devices and management

[evelyn-ys]

CLI support for data-box-edge
This PR covers data-box-edge operations which not involving encryption flow, including:

• az data-box-edge list-sku

• az data-box-edge list-node

• az data-box-edge show-job

• az data-box-edge device create

• az data-box-edge device list

• az data-box-edge device show

• az data-box-edge device update

• az data-box-edge device delete

• az data-box-edge device scan-for-update

• az data-box-edge device show-update-summary

• az data-box-edge device download-update

• az data-box-edge device install-update

• az data-box-edge alert list

• az data-box-edge alert show

• az data-box-edge order create

• az data-box-edge order list

• az data-box-edge order show

• az data-box-edge order update

• az data-box-edge order delete

• az data-box-edge bandwidth-schedule create

• az data-box-edge bandwidth-schedule list

• az data-box-edge bandwidth-schedule show

• az data-box-edge bandwidth-schedule update

• az data-box-edge bandwidth-schedule delete

---

This checklist is used to make sure that common guidelines for a pull request are followed.

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your PR is merged into master branch, a new PR will be created to update src/index.json automatically.
The precondition is to put your code inside this repo and upgrade the version in the PR but do not modify src/index.json.

[yonzhan]

Databoxedge

[evelyn-ys]

Moved to main repo to support azure stack: Azure/azure-cli#16193