[CodeFormat] Clang-format cpp sources (#4965)

Clang-format all c++ source files.

be/src/exec/aggregation_node_ir.cpp

@@ -16,7 +16,6 @@
 // under the License.
 
 #include "exec/aggregation_node.h"
-
 #include "exec/hash_table.hpp"
 #include "runtime/row_batch.h"
 #include "runtime/runtime_state.h"
@@ -48,5 +47,4 @@ void AggregationNode::process_row_batch_with_grouping(RowBatch* batch, MemPool*
     }
 }
 
-}
-
+} // namespace doris