show placement always pending

[Lily2025]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1、create partitioned table with placement
2、show placement

2. What did you expect to see? (Required)

"expect": "SCHEDULED

3. What did you see instead (Required)

2024-09-07T01:24:08.475+0800 INFO 7519231 utils/db.go:99 Still waiting for schedule state {"target": "TABLE geopartition.t2", "placement": "LEADER_CONSTRAINTS="[+region=us-west-1]" FOLLOWERS=1", "state": "PENDING", "expect": "SCHEDULED"}

4. What is your TiDB version? (Required)

v8.4.0 master

[Lily2025]

/assign gmhdbjd