crostini: Move the container upgrade load time data override to the right location.

Test: None
Bug: None
Change-Id: Ia7cd6efe90968e06c0a4a96f7e2104e05ee9e961
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2091091
Auto-Submit: David Munro <davidmunro@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Commit-Queue: David Munro <davidmunro@google.com>
Cr-Commit-Position: refs/heads/master@{#748543}

chrome/test/data/webui/settings/chromeos/crostini_page_test.js

@@ -53,9 +53,6 @@ suite('CrostiniPageTests', function() {
   suite('Main Page', function() {
     setup(function() {
       setCrostiniPrefs(false);
-      loadTimeData.overrideValues({
-        showCrostiniContainerUpgrade: true,
-      });
     });
 
     test('Enable', function() {
@@ -98,6 +95,7 @@ suite('CrostiniPageTests', function() {
       setCrostiniPrefs(true);
       loadTimeData.overrideValues({
         showCrostiniExportImport: true,
+        showCrostiniContainerUpgrade: true,
         showCrostiniPortForwarding: true,
         showCrostiniMic: true,
       });