Worker platform and key improvements

[Ulincsys]

Update the platform table with the following goals:

• Add user-facing "Pretty name" column for identifying the platform to the user
• Add "enabled" column to indicate whether or not collection should run for the given platform
  • The actual functionality of enabling or disabling a platform can be done later

Update the worker oauth table with the following goals:

• Add "platform features" column for storing key pseudo-platforms (IE: the different request limits for each key type).
  • EG: rest and graphql

Stop storing keys in the config table:

• Ensure that all references to the keys stored in the config are removed, and replaced with the KeyClient and KeyPublisher
• On install, keys should be stored in the oauth table by default

[KhanRayyan3622]

Hi! I'd like to work on this issue. I’ll start by adding the pretty_name and enabled columns to the platform table and can follow up with the OAuth table and key migration. Let me know if there’s anything I should keep in mind while making these changes!