Short Circuit Analyzer Execution if all topics filtered out

[Noggog]

We have ISeverityLookup which can report the severity to be considered per topic. So maybe the engine can loop the topics in an analyzer and not run any that aren't applicable after the adjustment?

Can we do this filtering somehow ahead of a run at the time of config loading? Otherwise we'll be paying for this filtering on every analyzer execution, which is not great

[Elscrux]

Probably needs to be part of the same abstraction for calling analyzers that's needed for #125

[Noggog]

We can accomplish this just by adding a layer between the driver and the analyzers

public ContextualDriver(
    IContextualAnalyzer[] contextualAnalyzers,

Right now it's requesting them straightaway, but we could swap it for
IAnalyzerProvider<IContextualAnalyzer> analyzersProvider
where the implementation of that brings in all contextual analyzers + the config and filters them out for the driver

Driver remains naive. It just takes the list of analyzers and runs them. Something else does the filtering