[SSE Sidecar] Sidecar service should support configuration file-based Event Filtering

@hectoratcasper commented on [Thu Jun 02 2022](https://github.com/CasperLabs/product/issues/184)

# The sidecar should allow the ability to implement configuration file-based Event Filtering

The sidecar should allow node operators to set preferences for the types of events they want to receive during their session. This will enable users to filter out events that are not relevant to them and reduce the amount of data they need to process.

```
[event_filtering_settings]
#Event types to filter
include_event_types = ["shutdown", "deployExpired "]

```

# Resources
Please refer to the SSE Sidecar High Level Design document for high level implementation details.
https://docs.google.com/document/d/1vBRbBmij9HHotY_8HIaUKk5a9Kq9Rqgxlk-UAE_F7xs/edit#heading=h.dqrvn1jm98w6

Repository for this project:
https://github.com/CasperLabs/event-sidecar

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@RitaMAllenCA commented on [Thu Nov 10 2022](https://github.com/CasperLabs/product/issues/184#issuecomment-1310862888)

@George-cl need an estimate please