[Feature]: support analyzing error for OB_MAJOR_FREEZE_NOT_ALLOW when manually execute merge

[alfredsongl]

Describe your use case

用户不清楚或者没注意当前租户是主租户还是备租户时，手动执行了合并操作
ALTER SYSTEM MAJOR FREEZE tenant = xxx;

出现错误：
ERROR 4217 (HY000): Major freeze not allowed now

问题来源：
https://ask.oceanbase.com/t/topic/35618459

Describe the solution you'd like

1.分析observer.log，发现有报错OB_MAJOR_FREEZE_NOT_ALLOW

2.select tenant_role from dba_ob_tenants where tenant_name=xxx;

3.确定tenant_role是standby 备租户

Describe alternatives you've considered

No response

Additional context

No response

[Teingi]

需要设计一下放在哪个功能模块合适