✨ Incur gas cost for data requests that time out

[Thomasvdam]

✨ Feature

We want a small portion of the funds attached to a timed-out data request to be distributed to the executors that did commit.

Motivation

This makes it less risky for the solver to escrow their funds, incentives requestors to properly price their data requests, and makes it less risky for an executor node to post a commitment.

Implementation

• Add param for a fixed amount of gas that will be charged per commitment in the case of a timeout. This amount should at least be equal to the gas cost of spinning up a VM.
• When a DR times out due to not receiving enough commitments calculate the gas used based on the param.
• Create the correct distribution messages when removing the DR from the contract.