Use column names instead of field refs for pivot viz settings (#49414)

...enarios/collections/collection-pinned-overview.cy.spec.js

.../scenarios/visualizations-tabular/pivot_tables.cy.spec.js

...s-tabular/visualizations-tabular-reproductions.cy.spec.js

...se/backend/src/metabase_enterprise/serialization/load.clj

...kend/test/metabase_enterprise/serialization/load_test.clj

...kend/test/metabase_enterprise/serialization/test_util.clj

...nd/test/metabase_enterprise/serialization/v2/e2e_test.clj

frontend/src/metabase-lib/v1/queries/utils/pivot.js

frontend/src/metabase-lib/v1/queries/utils/pivot.ts

frontend/src/metabase-types/api/card.ts

frontend/src/metabase/lib/data_grid.js

...se/query_builder/actions/core/updateQuestion.unit.spec.ts

...metabase/querying/viz-settings/utils/sync-viz-settings.ts

...erying/viz-settings/utils/sync-viz-settings.unit.spec.tsx

frontend/src/metabase/services.js

frontend/src/metabase/services.unit.spec.ts

...tions/components/settings/ChartSettingFieldsPartition.jsx

...ponents/settings/ChartSettingFieldsPartition.unit.spec.js

...rtSettingsListColumns/ChartSettingsListColumns.styled.tsx

...ngs/ChartSettingsListColumns/ChartSettingsListColumns.tsx