[Image Update] Add docker rootless mode to Azure Cloud Shell

Thank you for filing this request! Please take a few minutes to fill out this template so that we can better understand the request.

#### Which image would you like to change?
The base image for cloud shell
#### What changes are you requesting?
Please add docker in rootless mode to the azure cloud shell base image - https://docs.docker.com/engine/security/rootless/#install
#### What scenario are these changes enabling?
This scenario enables scripts to be ran in cloud shell against Azure infrastructure that leverages docker commands, docker images, etc. Also this scenario would enable admins to interact with an Azure Container Registry with docker.
#### By how much does this change change the image size?
Nominal.

Beginne mit dem Azure Cloud Shell-Basisimage und den in der Anfrage verlinkten Installationsanweisungen für den rootless-mode von Docker. Füge rootless Docker zum Image hinzu und überprüfe anschließend, dass Docker-Befehle und Docker-Images in Cloud Shell für Azure-Infrastrukturszenarien und Azure Container Registry-Szenarien funktionieren.

Vom Indexierungsmodell aus dem Issue-Text verfasst.