Fix union error in telemetry.active_users_aggregates_mobile view.

The `klar_android.active_users_aggregates` view and its underlying `klar_android_derived.active_users_aggregates_v3` table have a different schema than the rest of the apps, because it was added more recently (#5624) after some columns were removed from the `active_users_aggregates_v3` ETL (#5396).

sql_generators/active_users_aggregates_v3/templates/mobile_view.sql

@@ -1,33 +1,51 @@
 --- User-facing view for all mobile apps. Generated via sql_generators.active_users.
 CREATE OR REPLACE VIEW
-  `{{ project_id }}.{{ dataset_id }}.active_users_aggregates_mobile`
-AS
-SELECT
-  *
-FROM
-  `{{ project_id }}.{{ fenix_dataset }}.active_users_aggregates`
-UNION ALL
-SELECT
-  *
-FROM
-  `{{ project_id }}.{{ firefox_ios_dataset }}.active_users_aggregates`
-UNION ALL
-SELECT
-  *
-FROM
-  `{{ project_id }}.{{ focus_ios_dataset }}.active_users_aggregates`
-UNION ALL
-SELECT
-  *
-FROM
-  `{{ project_id }}.{{ klar_ios_dataset }}.active_users_aggregates`
-UNION ALL
-SELECT
-  *
-FROM
-  `{{ project_id }}.{{ focus_android_dataset }}.active_users_aggregates`
-UNION ALL
-SELECT
-  *
-FROM
-  `{{ project_id }}.{{ klar_android_dataset }}.active_users_aggregates`
+  `{{ project_id }}.{{ dataset_id }}.active_users_aggregates_mobile` AS
+  {% for app_dataset_id in [
+      fenix_dataset,
+      firefox_ios_dataset,
+      focus_ios_dataset,
+      klar_ios_dataset,
+      focus_android_dataset,
+      klar_android_dataset
+  ] %}
+    {% if not loop.first %}
+      UNION ALL
+    {% endif %}
+    SELECT
+      segment,
+      attribution_medium,
+      attribution_source,
+      attributed,
+      city,
+      country,
+      distribution_id,
+      first_seen_year,
+      is_default_browser,
+      locale,
+      channel,
+      os,
+      os_version,
+      os_version_major,
+      os_version_minor,
+      submission_date,
+      adjust_network,
+      install_source,
+      daily_users,
+      weekly_users,
+      monthly_users,
+      dau,
+      wau,
+      mau,
+      uri_count,
+      active_hours,
+      app_name,
+      app_version,
+      app_version_major,
+      app_version_minor,
+      app_version_patch_revision,
+      app_version_is_major_release,
+      os_grouped,
+    FROM
+      `{{ project_id }}.{{ app_dataset_id }}.active_users_aggregates`
+  {% endfor %}