Feature: FileStorePluginBase allow for a custom `make_filename`

[thopkins32]

Rather than only allow for templating using datetime.now(), we should allow a custom implementation of make_filename so that upper level directories can be dynamically created.

For example, if we have area detector data that we want written to

/data/<session-id>/<detector-name>/yyyy/mm/dd/<filename>.hdf

We currently cannot handle an update to the <session-id> without re-initializing the ophyd device (relaunching the profile).

Since we want this auto-updating behavior, I propose that we allow for make_filename to be a Callable that maps a FileStorePluginBase -> tuple[str, str, str] for the filename, read_path, and write_path, respectively.

[thopkins32]

Similar to ophyd-async path providers: https://github.com/bluesky/ophyd-async/blob/main/src/ophyd_async/core/_providers.py

[jwlodek]

Just FYI, for now we've worked around this by adding a way to update the write paths at stage, like: https://github.com/NSLS-II-BMM/profile_collection/blob/21675c4c77e08c3c3a909854b8edce9547e2aac2/startup/BMM/xspress3.py#L73-L88