How to disable Feast's serialization format

[fcas]

Is your feature request related to a problem? Please describe. Would it be possible to disable the serialization process?

Describe the solution you'd like An option to disable the serialization process, for exemple: -1.

Describe alternatives you've considered One additional idea to consider might be the development of an extension for a customized serialization process.

Additional context Currently, writing to the DynamoDB online store involves a serialization step. While DynamoDB offers a convenient CSV export feature, the exported data retains Feast's serialization format. This creates a tight coupling between our data export and Feast's internal serialization process, which could lead to inflexibility and potential issues if Feast's serialization changes in the future. Ref: https://github.com/feast-dev/feast/blob/master/docs/specs/online_store_format.md