Currently all checks will appear as both checks (about content you wrote) and suggestions (about content you didn't write).
We should be able to flag a given check as being only a check or a suggestion.
Uncertain: whether this should be done at a code level (like which moments a check can show in) or via config.
Requirements
Make it possible for an Edit Suggestion (e.g. external link, duplicate link, engvar, etc.) to appear within Suggestion Mode without needing it to appear as an Edit Check
Note: the work e ability to "robustly" configure suggestions so that we can make it possible to determine what Suggestions are available to newcomers in the experiment (T404600) and the experienced volunteers we assume will have the beta feature enabled (T399611) will happen in T410524.
