[BUG] fix incorrect import for opensearch aggs

Incorrect import statement that was introduced here:
opensearch-project#688

Verified other imports and the rest look fine.

Issue:
n/a

Signed-off-by: Kawika Avilla <kavilla414@gmail.com>

src/plugins/data/common/search/expressions/opensearchaggs.ts

@@ -34,7 +34,7 @@ import {
   OpenSearchDashboardsContext,
   OpenSearchDashboardsDatatable,
   ExpressionFunctionDefinition,
-} from '../../../common/search';
+} from '../../../../expressions/common';
 
 type Input = OpenSearchDashboardsContext | null;
 type Output = Promise<OpenSearchDashboardsDatatable>;