[Enhancement] prune operator resources and rbac rules

[xiacongling]

Search before asking

• I had searched in the issues and found no similar issues.

Description

Before deploying the Doris Operator to the Kubernetes cluster, our Kubernetes team determined that for Kubernetes clusters running multiple applications, the resource and permission requirements of the current doris-operator pose certain security risks:

1. ClusterRole of the doris-operator has the rule of ClusterRoleBinding creation and deletion. It could potentially modify the permissions of current and other ServiceAccounts;
2. doris-operator requires webhook resources. It may degrade Kubernetes cluster event-processing efficiency, and could even cause cluster-level failures due to improper event handling in the hook.

Solution

Are webhooks and updating cluster-role-binding necessary for doris-operator? Can we remove them?

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct