Fix display of unformatted errors in composition

[JakeDawkins]

Right now, apollo service:check for federated services expects a specifically shaped error message from composition errors, but not all errors are the expected shape. When that happens, we are not formatting the errors properly for display, and users are seeing a cryptic error about an inconsistent number of cells in the display table. This PR aims to fix that by displaying unformatted (unexpected) errors separately from the ones we can recognize and format.

before:

after:

TODO:

• Update CHANGELOG.md* with your change (include reference to issue & this PR)
• Make sure all of the significant new logic is covered by tests
• Rebase your changes on master so that they can be merged easily
• Make sure all tests and linter rules pass

*Make sure changelog entries note which project(s) has been affected. See older entries for examples on what this looks like.

[sponomarev]

@JakeDawkins The same problem has been addressed in #1745 earlier and was ignored 😞