Replace owner with first_owner in request specs

spec/presenters/blob_presenter_spec.rb

spec/requests/api/api_spec.rb

spec/requests/api/ci/pipelines_spec.rb

.../requests/api/ci/runners_reset_registration_token_spec.rb

spec/requests/api/graphql/ci/ci_cd_setting_spec.rb

...container_repository/container_repository_details_spec.rb

spec/requests/api/graphql/gitlab_schema_spec.rb

...ts/api/graphql/mutations/ci/ci_cd_settings_update_spec.rb

.../graphql/mutations/ci/job_token_scope/add_project_spec.rb

...aphql/mutations/ci/job_token_scope/remove_project_spec.rb

...equests/api/graphql/mutations/ci/pipeline_destroy_spec.rb

...hql/mutations/ci/runners_registration_token/reset_spec.rb

...ions/security/ci_configuration/configure_sast_iac_spec.rb

...urity/ci_configuration/configure_secret_detection_spec.rb

...s/api/graphql/project/container_expiration_policy_spec.rb

...quests/api/graphql/project/container_repositories_spec.rb

...ject/error_tracking/sentry_detailed_error_request_spec.rb

...phql/project/error_tracking/sentry_errors_request_spec.rb

.../requests/api/graphql/project/grafana_integration_spec.rb

.../graphql/project/issue/design_collection/versions_spec.rb