feat: implement motions for sub-queries

src/errors.rs

src/ir/expression.rs

src/ir/expression/tests.rs

src/ir/operator.rs

src/ir/transformation.rs

src/ir/transformation/distribution_enforcement.rs

src/ir/transformation/equality_propagation.rs

src/ir/transformation/redistribution.rs

src/ir/transformation/redistribution/tests.rs

src/ir/tree.rs

src/ir/tree/tests.rs

...ormation/redistribution/segment_motion_for_sub_query.yaml