Add checkbox for JSONStringify

[ghost]

Task name: AzureResourceGroupDeploymentV2, AzureResourceManagerTemplateDeploymentV3

Description: Added a new checkbox to make it possible to disable JSON.Stringify for deployment outputs

Documentation changes required: (Y/N) Y

https://github.com/microsoft/azure-pipelines-tasks/blob/f0644fb5a1710fd69f4a3f51298a7d555ba0f15c/Tasks/AzureResourceGroupDeploymentV2/README.md#deployment-outputs

https://github.com/microsoft/azure-pipelines-tasks/blob/f0644fb5a1710fd69f4a3f51298a7d555ba0f15c/Tasks/AzureResourceManagerTemplateDeploymentV3/README.md#deployment-outputs

Added unit tests: (Y/N) N

Attached related issue: (Y/N)

Issue based on this PR #16283

Checklist:

• Task version was bumped - please check instruction how to do it
• Checked that applied changes work as expected

Since both task are sharing same "id" but naming is different, ci-test can't group them correctly.
I manually triggered ci-test-tasks-main

[svrooij]

Thanks for completely removing my name as contributor… #16283

you can always make someone co-author, by adding something to the commit message. https://docs.github.com/en/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/creating-a-commit-with-multiple-authors