cannot restore physically user table if column count mismatch #68861

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. snapshot restore
2. table mysql.user is different from that of backup.

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

logically restore system tables

3. What did you see instead (Required)

physically restore system tables

4. What is your TiDB version? (Required)

v8.5.6