Make test tree more consistent with src tree

frontend/src/metabase-lib/lib/Mode.js

 import _ from "underscore";
 
 import Question from "metabase-lib/lib/Question";
-import { getMode } from "metabase/qb/lib/modes";
+import { getMode } from "metabase/modes/lib/modes";
 
 import type {
   ClickAction,

frontend/src/metabase-lib/lib/Question.js

@@ -24,7 +24,7 @@ import {
   distribution,
   toUnderlyingRecords,
   drillUnderlyingRecords,
-} from "metabase/qb/lib/actions";
+} from "metabase/modes/lib/actions";
 
 import _ from "underscore";
 import { chain, assoc } from "icepick";