[CCE] Limited CCE Addon Available

[zhenzh]

1. Only 4 cce addon are available in provider now, when will other addons(at least necessary addon like npd/autoscaler) be supported?
2. some system plugins like coredns/everest are auto installed with cce creation. How can I get them managed by my terraform if they are not installed by the terraform?
3. No data source for cce addon so that I can not determain the exact available versions for my cce. It's hard to maintain the addon version in terraform.
4. Can addon supports nodeselector and toleration?

[niuzhenguo]

Maybe you can try this data soruce https://registry.terraform.io/providers/huaweicloud/huaweicloud/latest/docs/data-sources/cce_addon_template

[niuzhenguo]

We also don't know how to create other addons on Terraform side as CCE doesn't provide the related documentation...