[ARM] az policy: Rewrite Azure Policy CRUD commands using auto-generation

[Celinadhh]

Related command

az policy assignment {create, delete, list, show, update}
az policy assignment identity {assign, remove, show}
az policy assignment non-compliance-message {create, delete, list, show, update}
az policy definition {create, delete, list, show, update}
az policy definition version {create, delete, list, show, update}
az policy enrollment {create, delete, list, show, update}
az policy exemption {create, delete, list, show, update}
az policy set-definition {create, delete, list, show, update}
az policy set-definition version {create, delete, list, show, update}

Description
Reimplement all azure policy CRUD commands using the auto-generation toolset with customization. This will onboard CLI to the newer api-versions.

Testing Guide
All tests are updated and passing in record and playback modes.
Few new tests added.

History Notes

---

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

• The PR title and description has followed the guideline in Submitting Pull Requests.

• I adhere to the Command Guidelines.

• I adhere to the Error Handling Guidelines.

[azure-client-tools-bot-prd]

Validation for Azure CLI Full Test Starting...

Thanks for your contribution!

[azure-client-tools-bot-prd]

Hi @Celinadhh,
Since the current milestone time is less than 7 days, this pr will be reviewed in the next milestone.

[azure-client-tools-bot-prd]

Validation for Breaking Change Starting...

Thanks for your contribution!

[yonzhan]

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

[github-actions]

The git hooks are available for azure-cli and azure-cli-extensions repos. They could help you run required checks before creating the PR.

Please sync the latest code with latest dev branch (for azure-cli) or main branch (for azure-cli-extensions).
After that please run the following commands to enable git hooks:

pip install azdev --upgrade
azdev setup -c <your azure-cli repo path> -r <your azure-cli-extensions repo path>