Prover/limitless backend controller

[srinathln7]

This PR implements issue(s) #

• Extending job definitions to support jobs with multiple inputs and multiple outputs and making all corresponding changes
• Modifying the file watcher slightly to accommodate jobs with multiple input files as was needed
• Refactor the existing codebase to minimize redundancy
• Limitless prover unit tests

Remark:
This codebase assumes that all the required directories for the limitless prover are in place, whereas in practice, only the Bootstrap request files will be placed by the coordinator. Additional features may be needed to develop a service that can create request files for GL, Random Beacon, LPP, and Conglomeration. This is expected to become clearer as we start integrating the controller with the backend for limitless prover.

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[cla-assistant]

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_{You have signed the CLA already but the status is still pending? Let us recheck it.}