[Az.CosmosDB] Add support for capabilities and disableLocalAuth updates in UpdateAzCosmosDBAccount#29290

tiffanytsang wants to merge 4 commits intoAzure:mainAzure/azure-powershell:mainfrom

tiffanytsang:users/tiffanytsang/UpdateAzCosmosDBAccounttiffanytsang/azure-powershell:users/tiffanytsang/UpdateAzCosmosDBAccountCopy head branch name to clipboard