Support different data pipelines

[motin]

As explained in the readme at https://github.com/mozilla/shield-studies-addon-utils/tree/develop#data-processing-pipelines, utils v5 is expected to support different data pipelines.

In practice, this would be configured by a pipeline configuration entry in studySetup, set to one of the below values. UPDATE: the configuration entry is called studyType instead

Depending on which data processing pipeline the study add-on is configured to use, the pings end up in different destinations:

• shield - The pings end up in the shield-study and shield-study-addon Telemetry buckets for faster analysis (like these: Most recent pings arriving to telemetry_shield_study_addon_parquet by study)
• pioneer - The pings are encrypted and end up in the Pioneer processing pipeline
• custom-telemetry-events - The pings are sent as custom telemetry events and end up in the ordinary destination for custom telemetry events