Align SeedPrompt with PromptRequestPiece

[hannahwestra25]

Description

Problem: Use of sequence in SeedPrompt was unclear and SeedPrompts did not support roles. Sequence in SeedPrompt and PromptRequestPiece should mean the same thing.

PromptRequestResponse: This is a single request to a target. It can contain multiple prompt request pieces. Within a PromptRequestResponse, PromptRequestPieces must share:

• Conversation id
• Roles
• Sequences

SeedPromptGroup: A group of prompts that need to be sent together. It can contain multiple SeedPrompts. Each SeedPromptGroup will share:

• Prompt_group_id (corresponds to prompt_group_alias)

Sequence: The turn in a conversation; will be the same with prompts that are sent together (i.e. an image and text)

SeedPrompts can be associated together using the sequence number. If two (or more) SeedPrompts share both a prompt_group_alias (ie a prompt_group_id meaning they are apart of the same SeedPromptGroup) AND the same sequence number, the SeedPrompts are associated and are sent in the order the sequence specifies.

PromptRequestPieces will be associated together using the sequence number. PromptRequestPieces with the same sequence can be associated via a PromptRequestResponse (which requires that all PromptRequestPieces share the same sequence). The sequence then specifies which order PromptRequestResponse will be sent in the conversation.

Both SeedPrompts with the same sequence which are in the same SeedPromptGroup and PromptRequestPieces with the same sequence which are in the same conversation must share a role.

This PR adds the role to SeedPrompt and enforces that SeedPrompts in a SeedPromptGroup that have the same sequence also have the same role. Additionally, move SeedPromptGroup and SeedPromptDataset to their own files.

Tests and Documentation

Added a few tests and updated the prompt datasets we have