In practice, this only works for the go check at the moment, which has the fixable go-generate check, but other linters can implement Fix as well in the future
Test plan
Add a test lint target that is always broken, but is "fixable":
{Name:"test",Description:"Check for broken urls in the codebase",Checks:[]*linter{{Name:"test",Check:func(ctxcontext.Context,out*std.Output,args*repo.State)error{returnerrors.New("ah")},Fix:func(ctxcontext.Context,ciocheck.IO,args*repo.State)error{cio.WriteSuccessf("Yay!")returnnil},},},},
