[ntp][modules] Add shopping module fieldtrial_testing_config.json

Bug: 1110075
Change-Id: I735506c3e0efff1f92582498400bea0a914cf215
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2566374
Auto-Submit: Tibor Goldschwendt <tiborg@chromium.org>
Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Caitlin Fischer <caitlinfischer@google.com>
Commit-Queue: Tibor Goldschwendt <tiborg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833561}

testing/variations/fieldtrial_testing_config.json

@@ -2285,6 +2285,25 @@
             ]
         }
     ],
+    "DesktopNtpShoppingTasksModule": [
+        {
+            "platforms": [
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "NtpModules",
+                        "NtpShoppingTasksModule"
+                    ]
+                }
+            ]
+        }
+    ],
     "DesktopTabGroupsCollapse": [
         {
             "platforms": [