[BREAKING] FEAT: Adding Context Compliance Orchestrator

[rlundeen2]

This orchestrator updates the context to prime an objective_chat_target to answer. The context is set using instructions defined in context_description_instructions_path, along with an adversarial_chat to generate the first turns to send.

Additionally

• Updated SearchReplaceConverter to accept regex flags (which this needed). This is breaking since the arg names are updated.
• Added a function in PromptSendingOrchestrator that can be overridden so prepending conversations can now use the objective for context
• Added validation to subclasses of PromptSendingOrchestrator that only make sense with text