Allow a worker (internal) to connect to multiple workflow types

[lfse-slafleur]

Tasks:

• Extend SDK to allow for multiple workflow types.
• Update (and test with) optimizer worker & simulator worker.
• Extend optimizer-worker to support Gurobi solver next to HIGHS solver: https://github.com/Project-OMOTES/optimizer-worker/pull/75/files
• Add workflows types based on Gurobi to workflow_config.json in omotes-system.
• Include a Gurobi worker on omotes-system/docker-compose.yml

Goal:

• Have one optimizer-worker code base which supports Gurobi solver and HIGHs solver.
• Should deploy a single Gurobi optimizer worker that connects to all available Gurobi workflows.
• Should deploy all other optimizer workers for HIGHS in the same way it does now.