Show namespace limit for product analytics usage

...oup_usage/product_analytics_group_monthly_usage_chart.vue

.../components/group_usage/product_analytics_group_usage.vue

...ts/group_usage/product_analytics_group_usage_overview.vue

...nalytics/components/product_analytics_usage_quota_app.vue

...cripts/usage_quotas/product_analytics/components/utils.js

...l/queries/get_group_product_analytics_usage.query.graphql

ee/app/controllers/ee/groups/usage_quotas_controller.rb

...usage/product_analytics_group_monthly_usage_chart_spec.js

...roup_usage/product_analytics_group_usage_overview_spec.js

...ponents/group_usage/product_analytics_group_usage_spec.js

...tics/components/product_analytics_usage_quota_app_spec.js

...d/usage_quotas/product_analytics/components/utils_spec.js

...ntend/usage_quotas/product_analytics/graphql/mock_data.js

locale/gitlab.pot