Privacy statement on first installation of aksarc az cli extension

**Title**: Privacy statement on first installation of aksarc az cli extension

**Description**:
On first installation of aksarc az cli extension, invoking any command prints a privacy statement to stdout which makes automation a pain.

Try this:
az extension remove --name aksarc
az extension add --name aksarc --version 1.2.23 --only-show-errors
az aksarc get-versions --resource-group $resource_group --custom-location $customlocationName --only-show-errors --output json

The result contains this line before the json output: "Please see Microsoft's privacy statement for more information: https://go.microsoft.com/fwlink/?LinkId=521839"

I know this is not a bug, hence creating a feature request. Please remove this line from stdout, especially when request is to output the result in json or tsv format.