Feat FSM mode: Still write to QList file

[kaikulimu]

In the existing code, FSM mode never writes to QList file. In this PR, we add a new doesFSMWriteQLIST flag to determine whether FSM mode still writes to QList file. Note that the PartitionFSMs do not synchronize QList file; they only synchronize journal and data files. Such synchronization will be added in a subsequent PR.

A benefit of this PR is that we are finally able to test switching from non-FSM to FSM then back to non-FSM in test_restart.py.

Also note that this PR is low-risk since it only affects FSM mode.

[kaikulimu]

@dorjesinpo Addressed feedback. Back to you

[kaikulimu]

@dorjesinpo Back to you