Add publish flag to `Dashboards.create_dashboard`

[JCZuurmond]

Resolves #219

[github-actions[bot]]

✅ 35/35 passed, 7 flaky, 2 skipped, 9m18s total

Flaky tests:

• 🤪 test_dashboard_deploys_dashboard_with_counter_variation (8.401s)
• 🤪 test_dashboard_deploys_dashboard_with_display_name (11.286s)
• 🤪 test_dashboard_deploys_dashboard_the_same_as_created_dashboard (12.337s)
• 🤪 test_dashboards_creates_dashboard_with_order_overwrite_in_dashboard_yaml (10.036s)
• 🤪 test_dashboard_deploys_dashboard_with_table (9.186s)
• 🤪 test_dashboards_creates_dashboard_from_query_with_cte (7.234s)
• 🤪 test_dashboard_deploys_dashboard_with_big_widget (9.275s)

_{Running from acceptance #328}