feat: Add Aggregation Method for Big Number with Trendline (#32767)

...rset-ui-chart-controls/src/operators/aggregateOperator.ts

...ackages/superset-ui-chart-controls/src/operators/index.ts

...-ui-chart-controls/src/shared-controls/customControls.tsx

...s/superset-ui-chart-controls/src/shared-controls/index.ts

...i-chart-controls/test/operators/aggregateOperator.test.ts

...chart-controls/test/operators/timeCompareOperator.test.ts

...ckages/superset-ui-core/src/query/types/PostProcessing.ts

.../superset-ui-core/test/query/types/PostProcessing.test.ts

...charts/src/BigNumber/BigNumberWithTrendline/buildQuery.ts

...rts/src/BigNumber/BigNumberWithTrendline/controlPanel.tsx

...ts/src/BigNumber/BigNumberWithTrendline/transformProps.ts

...lugin-chart-echarts/test/BigNumber/transformProps.test.ts