[Refactor]: automate ``seeweedfs`` volumes creation, and create a dedicated DO volume on prod

[Ahmad-mtos]

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📜 Description

Currently, to add a seaweedfs volume we have to create a new service in https://github.com/julep-ai/julep/blob/dev/blob-store/docker-compose-ha.yml. This process should be automated instead

👟 Relevant files

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