iclouddrive: mark the backend as case insensitive - fixes #10162

findLeafItem matches names with EqualFold, but the backend did not set
CaseInsensitive, so a case-only rename was not seen as the same object
and the file being renamed was trashed before the move.

backend/iclouddrive/iclouddrive.go

@@ -694,6 +694,7 @@ func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, e
 		pacer:  fs.NewPacer(ctx, pacer.NewDefault(pacer.MinSleep(minSleep), pacer.MaxSleep(maxSleep), pacer.DecayConstant(decayConstant))),
 	}
 	f.features = (&fs.Features{
+		CaseInsensitive:         true, // names are matched with EqualFold, see findLeafItem
 		CanHaveEmptyDirectories: true,
 		PartialUploads:          false,
 	}).Fill(ctx, f)