Export and Import Configs

[isra-fel]

Description

This PR implemented exporting and importing of configurations.

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)
    • https://github.com/Azure/azure-powershell-cmdlet-review-pr/issues/1210
  • the markdown help files have been regenerated using the commands listed here

[isra-fel]

This is expected as we do not allow clearing "Default" configs

[VeryEarly]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[isra-fel]

This one test case is constantly failing.

[xUnit.net 00:08:41.52]     Commands.Network.Test.ScenarioTests.PrivateLinkServiceTests.TestResourceManagerPrivateEndpoint [FAIL]
    X Commands.Network.Test.ScenarioTests.PrivateLinkServiceTests.TestResourceManagerPrivateEndpoint [1s 71ms]
EXEC : error Message:  [D:\a\1\s\build.proj]
     System.Management.Automation.ActionPreferenceStopException : The running command stopped because the preference variable "ErrorActionPreference" or common parameter is set to Stop: 
     Unable to find a matching HTTP request for URL 'GET /subscriptions/08b18a9d-315d-4e7b-9bcc-abcf418031e7/resourceGroups/testPS/providers/Microsoft.Authorization/resourceManagementPrivateLinks/RMPL?'. Calling method Item().

Have you noticed this in other PRs? @VeryEarly

[VeryEarly]

This one test case is constantly failing.

[xUnit.net 00:08:41.52]     Commands.Network.Test.ScenarioTests.PrivateLinkServiceTests.TestResourceManagerPrivateEndpoint [FAIL]
    X Commands.Network.Test.ScenarioTests.PrivateLinkServiceTests.TestResourceManagerPrivateEndpoint [1s 71ms]
EXEC : error Message:  [D:\a\1\s\build.proj]
     System.Management.Automation.ActionPreferenceStopException : The running command stopped because the preference variable "ErrorActionPreference" or common parameter is set to Stop: 
     Unable to find a matching HTTP request for URL 'GET /subscriptions/08b18a9d-315d-4e7b-9bcc-abcf418031e7/resourceGroups/testPS/providers/Microsoft.Authorization/resourceManagementPrivateLinks/RMPL?'. Calling method Item().

Have you noticed this in other PRs? @VeryEarly

haven't see this one before, but I did see similar issue where recorded request cannot be found even if there are no related test changes

[VeryEarly]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).