[fix](Nereids) Add exchange node check between local and global agg

[yinzhijian]

Proposed changes

Issue Number: close #xxx

Problem summary

table schema

CREATE TABLE t1 (
k1 int(11) NULL,
v1 int(11) NULL
) ENGINE=OLAP
DUPLICATE KEY(k1, v1)
COMMENT 'OLAP'
DISTRIBUTED BY HASH(k1) BUCKETS 3

query

select k1,count(distinct v1+1) from t1 group by k1;

error

java.lang.ClassCastException: org.apache.doris.planner.OlapScanNode cannot be cast to org.apache.doris.planner.AggregationNode

Checklist(Required)

1. Does it affect the original behavior:
   • Yes
   • No
   • I don't know
2. Has unit tests been added:
   • Yes
   • No
   • No Need
3. Has document been added or modified:
   • Yes
   • No
   • No Need
4. Does it need to update dependencies:
   • Yes
   • No
5. Are there any changes that cannot be rolled back:
   • Yes (If Yes, please explain WHY)
   • No

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...