YQL-20875: Pass validation flag to dq transport layer

#### Pass validation flag to DQ transport layer ✎

- Introduce and propagate datum validation mode through the DQ transport layer to ensure consistent validation behavior across serialization and deserialization operations
- Update transport serializers and deserializers to accept and utilize the validation mode parameter
- Pass validation settings from task runners and compute actors to maintain end-to-end validation consistency
- Add runtime settings serialization support to enable validation mode propagation in distributed scenarios
- Extend channel service components to handle validation mode in both input and output serializers
- Update various components including PQ read actors, wide combine operations, and spiller adapters to use the new validation parameter

<a href="https://nda.ya.ru/t/qa0kX64r7DqvtN"><font size="2">Autodescription by Yandex Code Assistant</font></a>
commit_hash:c93ab318c05269f0e8402259c94ea52ab03bc4fa

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