Adds a read-only "known baddies" list of feature/action combination where we know the event will produce marshalling or validation errors, and skips the error-logging step.

Note that the code fails the entire batch the way it works today, but in practice, none of our clients batch events yet, so this is something to fix when we start doing that.

Test plan

sg start enterprise

mutation {
  telemetry {
    recordEvents(
      events: [{feature: "cody.completion", action: "persistence:present", source: {client: "VSCode.Cody", clientVersion: "0.14.1"}, parameters: {version: 0, privateMetadata: 12}}]
    ) {
      alwaysNil
    }
  }
}

get an error response, but does not record a log in sg start output