Needs approval from an approver in each of these files:
- ~~[OWNERS](https://github.com/pingcap/docs-tidb-operator/blob/release-1.6/OWNERS)~~ [Oreoxmt]
Approvers can indicate their approval by writing `/approve` in a comment
Approvers can cancel approval by writing `/approve cancel` in a comment
This is an automated cherry-pick of #2581
First-time contributors' checklist
What is changed, added, or deleted? (Required)
TiDB operator v1.6.0 supports assigning node labels to TiProxy labels.
Which TiDB Operator version(s) do your changes apply to? (Required)
What is the related PR or file link(s)?