Add is draft flag to Report type.

openlobby/core/api/types.py

tests/mutations/snapshots/snap_test_create_report.py

tests/mutations/snapshots/snap_test_update_report.py

tests/mutations/test_create_report.py

tests/mutations/test_update_report.py

tests/schema/snapshots/snap_test_authors.py

tests/schema/snapshots/snap_test_node.py

tests/schema/snapshots/snap_test_report_drafts.py

tests/schema/snapshots/snap_test_search_reports.py

tests/schema/test_authors.py

tests/schema/test_node.py

tests/schema/test_report_drafts.py

tests/schema/test_search_reports.py