Move from mongodb to tiled-backed catalog

[canismarko]

The bluesky project is moving from storing raw scan documents in a mongo database via databroker to storing tabular data in a Tiled catalog backed by a relational (sqlite or postgres) database. This PR updates Haven and Firefly to use the Tiled catalog by default.

This change is necessary to enable ophyd-async detector data to be read back out by Tiled.

The aim with this PR is keep top-level features (e.g. run browser) the same as with the old database structure. This PR does not add features that will be useful with the new catalog, such as filtering by beamline; these will be added in a separate PR.

To avoid losing data, the raw documents should still be saved in the mongo database. This way, when we are ready to fully switch over we will create a new tiled catalog and stream the mongodb documents into the new catalog. I suggest we keep that old mongodb going until we are confident we don't need them.

Things to do before merging:

• add tests
• write docs
• update iconfig_testing.toml
• flake8, black, and isort
• test at the beamline

[canismarko]

As-written, the tiled writer exists as a run engine callback. Previously, we put documents on the kafka topic and read them out using the mongo_consumer.py. Do we want to do that here as well?

Maybe that should be a different PR, where the run_engine factory lets you attach the kafka producer instead of the tiled writer and databroker separately?

[canismarko]

Also, I think documentation for this belongs on the wiki, since it extends beyond the scope of Haven.

[canismarko]

As-written, the tiled writer exists as a run engine callback. Previously, we put documents on the kafka topic and read them out using the mongo_consumer.py. Do we want to do that here as well?

I added a TiledConsumer module to the queueserver package that reads documents from Kafka and sends them to Tiled. I will do a separate PR that adds a kafka produce to the run engine (the queueserver does this automatically).

[Cathyhjj]

Thank you for changing the data structure for me steal!