consider support `show cluster processlist` or `show full cluster processlist`

## Feature Request

**Is your feature request related to a problem? Please describe:**

From TiDB, we have supported global kill, see https://docs.pingcap.com/tidb/stable/tidb-configuration-file#enable-global-kill-new-in-v610

But unlike using `show processlist` can get the ID easily, we need to select from `information_schema.cluster_processlist` to get the remote ID.

**Describe the feature you'd like:**

Maybe we can support `show cluster processlist` or `show full cluster processlist`

**Describe alternatives you've considered:**
Above, use `select * from information_schema.cluster_processlist`;

**Teachability, Documentation, Adoption, Migration Strategy:**
No