Change String to SmolStr in SbroadError

sbroad-cartridge/src/api/calculate_bucket_id.rs

sbroad-cartridge/src/cartridge.rs

sbroad-cartridge/src/cartridge/config.rs

sbroad-cartridge/src/cartridge/router.rs

sbroad-cartridge/src/cartridge/storage.rs

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

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

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

sbroad-core/src/cbo/helpers.rs

sbroad-core/src/cbo/histogram.rs

sbroad-core/src/cbo/histogram/normalization.rs

sbroad-core/src/cbo/selectivity.rs

sbroad-core/src/errors.rs

sbroad-core/src/executor.rs

sbroad-core/src/executor/bucket.rs

sbroad-core/src/executor/engine.rs

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

sbroad-core/src/executor/engine/helpers/storage/runtime.rs

sbroad-core/src/executor/engine/helpers/vshard.rs

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