Consider allowing passing specific projection names in RunProjections #5246
Description
Is your feature request related to a problem? Please describe.
The RunProjections configuration option currently accepts 3 values: None, All and System.
Sometimes we might only want to enable specific projections instead of all projections or only system ones.
Describe the solution you'd like
It would be very convenient if we could pass in a list of the names of the projections to enable so that only those are enabled.
E.g. RunProjections : [ "$by_category", "$by_event_type" ]