v4.15.0

• Add Dragonfly resource (aiven_dragonfly) to allow for the creation and management of Dragonfly services
• Use new user config generator to generate service integration and service integration endpoint configs
• Fix aiven_kafka_schema version update
• Add external_aws_cloudwatch_logs, external_elasticsearch_logs_user_config, external_opensearch_logs_user_config,
  prometheus_user_config service integration configs
• Fix aiven_kafka_schema Protobuf normalization
• Fix aiven_service_integration_endpoint for external_postgresql type
• Add AIVEN_ALLOW_IP_FILTER_PURGE environment variable to allow purging of IP filters. This is a safety feature to
  prevent accidental purging of IP filters, which can lead to loss of access to services. To enable purging, set the
  environment variable to any value before running Terraform commands.
• Use TypeSet for ip_filter_object
• Fix incorrect behavior of aiven_mirrormaker_replication_flow schema fields:
  • sync_group_offsets_enabled
  • sync_group_offsets_interval_seconds
  • emit_backward_heartbeats_enabled
  • offset_syncs_topic_location
  • replication_policy_class
• Remove the beta flag for aiven_organization_user_group_member and aiven_organization_group_project resources