BOLT-1595 followup: fix vacuous Map-never-offered assertion in BlockBuilder.test.tsx

Address CodeRabbit finding on merged PR #13495 (apps/dashboard/components/boards/blocks/builder/BlockBuilder.test.tsx, tickets source test, lines ~264-269): the query screen.getAllByRole("radio", { name: /KPI|Table|Chart/ }) never includes a Map radio, so expect(kindValues).not.toContain("map") is vacuously true and cannot fail even if Map were accidentally enabled for tickets. Fix: query all radios (not just KPI|Table|Chart) or add an explicit assertion that no Map radio exists. New branch off main, new PR, linked to BOLT-1595.