Add simulate_rir_ism method for simulating RIR with Image Source Method
Doc page: https://output.circle-artifacts.com/output/job/a26503b3-98a5-4272-8add-cacb33932fef/artifacts/0/docs/prototype.functional.html#simulate-rir-ism
cc @fakufaku
After discussing with @fakufaku and @NicolasHug, the gradients of converting a float tensor to int tensor and using it as indices for another tensor may require an analytic formula. Before getting the formula with proof, I will disable the autograd test and focus on the numerical correctness in the forward method.
will address the issue in a new PR #2880