Add maxout for submit_qubo

[dhirpalshah]

Users may want to have control over the number of solutions that submit_qubo outputs. In the /server-superstaq/superstaq/request_converter.py, the function solve_qubo calls solver = SimulatedBifurcationMachine(workspace, loops=1000, maxout=1). This only outputs the first and best solution. We can try to include a parameter for clients to specify the number of solutions (maxout value) they want.

[dhirpalshah]

@pnoell requests this change soon so that he can integrate it with his SVM work, since the SVM work requires multiple solutions outputted.

[dhirpalshah]

also change loop # to 1 million, since timeout will then be the limiting factor

[dhirpalshah]

addressed in https://github.com/Infleqtion/server-superstaq/pull/2475 (server-side), and also in #621