I24 SSX: Create a data collection group on start

[DominicOram]

When the serial plan starts we want to make a data collection group with the correct parameters. We can do this by doing something similar to what GridscanISPyBCallback does on activity_gated_start.

• Make the serial collection plan emit a start document at the beginning of running
• Move DiffractionExperimentWithSample to somewhere common and make one in the plan out of the parameters we have
• The start document should have enough info to be able to call populate_data_collection_group by putting the params into something that inherits from DiffractionExperimentWithSample
• Move BaseISPyBCallback into the common area
• Create a subclass of BaseISPyBCallback that uses these parameters to make a group at start (does it make sense to refactor this into the start of BaseISPyBCallback?)

Acceptance Criteria

• On running serial collections a group is created with the expected params
• There is a system test that runs this against the dev ispyb database (we already have similar for other plans)

[noemifrisina]

Move BaseISPyBCallback into the common area

This will very likely be done as part of #214