Azure SDK Python mgmt packages overview page needs services.md

[navba-MSFT]

Most of mgmt packages explained here doesn't have service.md file here due to which it results in empty page.

Example for mgmt packages where Services.md file is missing causing a blank page to be displayed:
Automation Overview: https://docs.microsoft.com/en-us/python/api/overview/azure/automation?view=azure-python
Container Instances Overview: https://docs.microsoft.com/en-us/python/api/overview/azure/containerinstances?view=azure-python
Data Explorer: https://docs.microsoft.com/en-us/python/api/overview/azure/dataexplorer?view=azure-python
Data Share: https://docs.microsoft.com/en-us/python/api/overview/azure/datashare?view=azure-python
Private DNS: https://docs.microsoft.com/en-us/python/api/overview/azure/privatedns?view=azure-python

Please create the services.md file here so that we dont see blank pages in above links. These documentations should be fixed.

Note: I have listed only a few. There are many packages whose Overview page gives empty content.

Examples where the services.md is present and able to show the content:
Azure Storage: https://docs.microsoft.com/en-us/python/api/overview/azure/storage?view=azure-python
Compute: https://docs.microsoft.com/en-us/python/api/overview/azure/compute?view=azure-python
Container Registry: https://docs.microsoft.com/en-us/python/api/overview/azure/container-registry?view=azure-python
DevTest Labs: https://docs.microsoft.com/en-us/python/api/overview/azure/devtest-labs?view=azure-python