Following up on #39100, is it possible for the go command to return partial results even with an inconsistent vendor folder? This is done in several (arguably smaller) cases, like #35973 and #38846.

If go list could return partial results along with the error, that would make the experience in gopls much better for users. Right now, our best option will be to show the user a pop-up with the error message and a button that, when clicked, runs go mod vendor. This work-around is fine for now, but I wonder if there is a better longterm solution.

/cc @bcmills @jayconrod @heschik