Issue title: `ClientLastRespValue` is only used internally in `meta-raft-store`.
 Issue body: `ClientLastRespValue` is only used internally in `meta-raft-store`.
Is it possible to define it in `meta-raft-store`?

_Originally posted by @drmingdrmer in https://github.com/datafuselabs/databend/pull/2223#discussion_r727665935_
 Comments: 
 Comment 0: - fixed in #2224
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