Description

• Added Get-AzDeploymentManagementGroupWhatIfResult for getting ARM template What-If results at management Group scope
• Added Get-AzTenantWhatIfResult new cmdlet for getting ARM template What-If results at tenant scope
• Overrode -WhatIf and -Confirm for New-AzManagementGroupDeployment and New-AzTenantDeployment to use ARM template What-If results
• Fixed the hehaviors of -WhatIf and -Confirm for new deployment cmdlets so they comply with $WhatIfPreference and $ConfrimPreference (addresses Switch Parameter on the -Whatif doesn’t seem to behave correctly arm-template-whatif#106)
• Fixed serialization error for -TemplateObject and TemplateParameterObject (addresses TemplateParameterObject Serializes Hashtables & PSCustomObject Incorrectly #1528 and Splatting issues with complex PowerShell objects in New-AzureRmResourceGroupDeployment #6292)

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
  • the markdown help files have been regenerated using the commands listed here