Update readmes for the 2022-03-01 dev branch of container service#18357

ruowan merged 2 commits intoAzure:dev-containerservice-Microsoft.ContainerService-2022-03-01Azure/azure-rest-api-specs:dev-containerservice-Microsoft.ContainerService-2022-03-01from

FumingZhang:fuming/update-readme-cs-2022-03-01FumingZhang/azure-rest-api-specs:fuming/update-readme-cs-2022-03-01Copy head branch name to clipboard