feat: add arithmetic expressions to selection and joins

...d-cartridge/test_app/test/integration/arithmetic_test.lua

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

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

sbroad-core/src/executor/bucket.rs

sbroad-core/src/executor/ir.rs

sbroad-core/src/frontend/sql.rs

sbroad-core/src/frontend/sql/ast.rs

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

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

sbroad-core/src/ir.rs

sbroad-core/src/ir/api/parameter.rs

sbroad-core/src/ir/explain.rs

sbroad-core/src/ir/expression.rs

sbroad-core/src/ir/operator.rs

sbroad-core/src/ir/transformation.rs

sbroad-core/src/ir/transformation/merge_tuples.rs

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

sbroad-core/src/ir/tree/expression.rs

sbroad-core/src/ir/tree/subtree.rs