fix: wrong parenthesis around subquery under Motion

sbroad-cartridge/test_app/test/integration/motion_test.lua

sbroad-core/src/backend/sql/tree.rs

sbroad-core/src/executor.rs

sbroad-core/src/executor/engine/mock.rs

sbroad-core/src/executor/ir.rs

sbroad-core/src/executor/tests.rs

sbroad-core/src/executor/tests/exec_plan.rs

sbroad-core/src/executor/vtable.rs

sbroad-core/src/frontend/sql/ir/tests.rs

sbroad-core/src/frontend/sql/query.pest

sbroad-core/src/ir/distribution/tests.rs

sbroad-core/src/ir/helpers.rs

sbroad-core/src/ir/operator.rs

sbroad-core/src/ir/transformation/redistribution/groupby.rs

...mation/redistribution/full_motion_less_for_sub_query.yaml

...ribution/full_motion_non_segment_outer_for_sub_query.yaml

...r/transformation/redistribution/multiple_sub_queries.yaml

...ormation/redistribution/segment_motion_for_sub_query.yaml