az DesktopVirtualization update to 2021-07-12

[sayandaw]

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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?

resolves #4580

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.

[ghost]

Thank you for your contribution sayandaw! We will review the pull request and get back to you soon.

[ghost]

All CLA requirements met.

[yonzhan]

DesktopVirtualization

[wangzelin007]

Hi sayandaw,
We are going to release a new version of desktopvirtualization at 2022/04/06.
It will use the latest stable version (2021-07-12) of desktopvirtualization sdk.