groupby refactoring (#503)

* refactor groupBy impl

tmp commit

modify parser

modify subgraph

graphd compiled

complied

fix empty collect

fix UT

add bug

fix count

add visitors

add projCol

compiled

add parser ut

fix ut

plan validated

add pushUp flag

small change

fix ut memory leak

fix memory leak

handle yield validator

implicit groupby impl

add check

fix memory leak

fix memory leak

small change

fix memory leak

add agg check

* implicit groupBy refactoring

bak

add tck test cases

fix ut

implicit agg refactoring

fix agg Project

* small change

* fix memory leak

* add agg checks

fix agg check

small change

add test cases

* add tck test cases

add tck test cases

add group by tck test

small change

* fix test

modify visitors

small change

small change

fix avg

small change

small change

small change

* review

* delete AggFun cmake

* small change

* small change

* add multiVar check

* fix conflict

refactor implicit groupBy

fix

* add implicit groupBy where test cases

* fix ci

fix ci

* add case

* refactor GroupByValidator

fix case

small change

small change

small change

small change

small change

fix memory leak

fmt

small change

* review

fix ut

small change

* modify group by list check

* move test_groupby.py cases to tck

* add multiple user var check

multiple user var check

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>