Update serialization and deserialization in Pipeline checkpoints based on State serialization

[sjrl]

• Some unserializable keys in dataclasses were addressed in this PR. We should revisit the corresponding logic in the experimental repo: pipeline.py#L460.

• A utility method for serializing and deserializing values has been added in the core repository via this PR. The equivalent functionality in the pipeline logic can now be removed.

[sjrl]

Closing as duplicate of #9463