Verify that the order of the mini-batches is deterministic where it matters

[runame]

Some linear operators like FisherMCLinearOperator rely on deterministic mini-batches, i.e. that shuffle=False for the used data loader. Otherwise, there will be the following error which does not point out the cause of the issue:

RuntimeError: Check for deterministic matvec failed.

To avoid this we could check that shuffle=False upon construction.