pd leader is not balance when dr-auto-sync is enabled

[glorv]

Bug Report

What did you do?

Deploy a pd cluster with the recommanded topology of dr-auto-sync and enable dr-auto-sync.
The placement-rules is:

[
  {
    "group_id": "pd",
    "group_index": 0,
    "group_override": false,
    "rules": [
      {
        "group_id": "pd",
        "id": "lg1",
        "start_key": "",
        "end_key": "",
        "role": "voter",
        "count": 1,
        "location_labels": ["dc", "logic", "host"],
        "label_constraints": [{"key": "logic", "op": "in", "values": ["lg1"]}]
      },
      {
        "group_id": "pd",
        "id": "lg2",
        "start_key": "",
        "end_key": "",
        "role": "voter",
        "count": 1,
        "location_labels": ["dc", "logic", "host"],
        "label_constraints": [{"key": "logic", "op": "in", "values": ["lg2"]}]
      },
      {
        "group_id": "pd",
        "id": "lg3",
        "start_key": "",
        "end_key": "",
        "role": "voter",
        "count": 1,
        "location_labels": ["dc", "logic", "host"],
        "label_constraints": [{"key": "logic", "op": "in", "values": ["lg3"]}]
      },
      {
        "group_id": "pd",
        "id": "lg4",
        "start_key": "",
        "end_key": "",
        "role": "learner",
        "count": 1,
        "location_labels": ["dc", "logic", "host"],
        "label_constraints": [{"key": "logic", "op": "in", "values": ["lg4"]}]
      }
    ]
  }
]

What did you expect to see?

After the cluster is inited, all leaders should be balance across all primary stores.

What did you see instead?

The leader is not balanced.

What version of PD are you using (pd-server -V)?

v6.5.0

The MatchLabelsConstrains is not correct for transfer-leader-operator.

[bufferflies]

yes, the replace should support the exchange peer if their's rule role is same.