Add toggles for control ingesting data for only certain categories

[philidem]

It would be good to be able to limit ingestion to certain categories.

For example, in the AWS integrations you might have categories such as the following:

• [X] EC2
• [X] IAM
• [ ] RDS
• [X] Other

[aiwilliams]

Goals:

• Avoid exposing steps in the selection UI
• Perhaps categorize steps so that the UI shows the categories as options (EC2, IAM)
• Keep integration simple, support new steps and categories without messing up user's configuration of what to ingest
• Have a way to tell users that there are new categories of data they can ingest