Move namespace storage_counter to new usage_quotas folder

ee/app/assets/javascripts/pages/groups/usage_quotas/index.js

...p/assets/javascripts/pages/profiles/usage_quotas/index.js

ee/app/assets/javascripts/storage_counter/constants.js

ee/app/assets/javascripts/storage_counter/utils.js

...usage_quotas/storage/components/namespace_storage_app.vue

.../usage_quotas/storage/components/storage_inline_alert.vue

...s/storage/components/temporary_storage_increase_modal.vue

...ipts/usage_quotas/storage/components/usage_statistics.vue

...usage_quotas/storage/components/usage_statistics_card.vue

ee/app/assets/javascripts/usage_quotas/storage/constants.js

...avascripts/usage_quotas/storage/init_namespace_storage.js

...ge_quotas/storage/queries/namespace_storage.query.graphql

ee/app/assets/javascripts/usage_quotas/storage/utils.js

ee/spec/frontend/storage_counter/mock_data.js

ee/spec/frontend/storage_counter/utils_spec.js

...e_quotas/storage/components/namespace_storage_app_spec.js

...ge_quotas/storage/components/storage_inline_alert_spec.js

...orage/components/temporary_storage_increase_modal_spec.js

.../usage_quotas/storage/components/usage_statistics_spec.js

ee/spec/frontend/usage_quotas/storage/mock_data.js