Remove deprecated SiteRecovery project and module

[cormacpayne]

Description

Remove the deprecated SiteRecovery project in favor of RecoveryServices.SiteRecovery

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
  • the cmdlet markdown files were generated using the platyPS module

[cormacpayne]

@viverm Hey Vipin, would you mind verifying that I didn't miss any references to SiteRecovery that should be removed?

[maddieclayton]

@cormacpayne Looks like you need to remove the SiteRecovery and ServerManagement references here: https://github.com/Azure/azure-powershell/blob/046c07b020b2a24ded1b946d7b928d0be0f6cb20/tools/Tools.Common/Tools.Common.csproj

[maddieclayton]

on demand run here: https://azuresdkci.westus2.cloudapp.azure.com/view/PowerShell/job/powershell-demand/746/ (and 747)