Enable reporting of usage data for Jira integration

This enables self-hosted instances to report Jira integration usage
data.

Changelog: added

config/feature_flags/development/usage_data_track_ecosystem_jira_service.yml

----
-name: usage_data_track_ecosystem_jira_service
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/52110
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/300447
-milestone: '13.9'
-type: development
-group: group::ecosystem
-default_enabled: false

lib/gitlab/usage_data_counters/known_events/ecosystem.yml

@@ -4,22 +4,18 @@
   category: ecosystem
   redis_slot: ecosystem
   aggregation: weekly
-  feature_flag: usage_data_track_ecosystem_jira_service
 - name: i_ecosystem_jira_service_cross_reference
   category: ecosystem
   redis_slot: ecosystem
   aggregation: weekly
-  feature_flag: usage_data_track_ecosystem_jira_service
 - name: i_ecosystem_jira_service_list_issues
   category: ecosystem
   redis_slot: ecosystem
   aggregation: weekly
-  feature_flag: usage_data_track_ecosystem_jira_service
 - name: i_ecosystem_jira_service_create_issue
   category: ecosystem
   redis_slot: ecosystem
   aggregation: weekly
-  feature_flag: usage_data_track_ecosystem_jira_service
 - name: i_ecosystem_slack_service_issue_notification
   category: ecosystem
   redis_slot: ecosystem