Manage CNStore metadata at the CN node. Provide data for CN and HAKeeper's heartbeat process

Approved by: @nnsgmsone, @daviszhen, @reusee, @lni

Add CNStore metadata, used to CNStore send heartbeat to HAKeeper

Approved by: @lni

Add log for loaded local metadata in dnservice

Approved by: @lni

* morpc: use uint64 as the ID of the message

* Fix DATA RACE

* Refector logservice morpc

* Initial commit of TxnClient

* Fix txn client error code

* add test case

* Rename partitions to dnshards

* hakeeper: renamed {DN|Log}ShardInfo to {DN|Log}StoreInfo

* hakeeper: added DNShardRecord, DNShard and LogShardRecord types

* [Plan2] Initial commit of plan2 refactor

* update base_binder, finish bindExpr

* fix bind case expr bug

* improve date function

* Refactor plan2

* Add support for join tables

* Fix uninitialized map

* Fix bugs in addBinding

* update base binder

* Fix case sensitivity

* Suppress panics

* fix data_add/sub bug

* add wangjian's code back and change wangjian's code ut to use new binder for test

* Add the *dummy* subquery support

* fix typo

* add limit binder

* use BuildPlan to test,  fix ctetable is not init bug

* change bind subquery to fix build tpch error

* add distinct node, rename selectBinder to projectionBinder

* init support create plan

* change method arg

* fix bug and support agg

* distinct support

* cte support, tpch support, wangjian's ut pass

* fix ci error code

* fix deepcopy bug

* add distinct agg function support

* Don't let agglist bind to groupby

* add headings in Query and remove all ColName/TableName from new plan2

* fix projection pos bug

* fix join position bug

* add reset aggList's position

* Improve map performance

* fix result columns bug

* fix join position bug

* fix order by number  bug

* fix count(distinct 12) bug

* improve: return having bind error message in time

* support "select *" to throw "No table used" error

* fix case bug

* improve to check if function is agg/fun

* Fix join type

* push down onlist

* fix pushdown onlist bug

* fix bug: incorrect function name

* fix datetime/varchar +/- interval bug

* remove duplicate function

Co-authored-by: bRong Njam <longran1989@gmail.com>
Co-authored-by: nnsgmsone <nnsmgsone@outlook.com>

* Add metadata proto

* Update docs