[RecoveryServices.Backup] Breaking change release

[siddharth7]

Description

https://github.com/Azure/azure-powershell-cmdlet-review-pr/issues/210

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate change log has been updated
• 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:
  • the changes have gone through a cmdlet design review (Microsoft internal partners only)
  • the cmdlet markdown files were generated using the platyPS module

[cormacpayne]

@siddharth7 Hey Siddharth, I re-targeted your PR at the new default branch, master, which contains a bulk of the current changes moving from AzureRM to Az. You will need to pull the latest changes from this branch and resolve the merge conflicts -- the AzureRM markdown files have been removed and replaced by the corresponding Az files, so you will need to make the corresponding changes there, and the ChangeLog.md file has been cleared, so you will need to make sure the only header remaining is ## Current Release. Feel free to ping me if you have any questions.