docs: Update using-pre-aggregations.mdx (#8723)

The export buckets section linked to an outdated list of data sources that support export buckets. Instead of adding to the list all of the missing data sources, I have changed this to a generic link so that we do not need to constantly keep it up to date.

Author: morgan-at-cube

docs/pages/product/caching/using-pre-aggregations.mdx

@@ -959,13 +959,10 @@ Cube Store in parallel:
   />
 </div>
 
-Enabling the export bucket functionality requires extra configuration; please
-refer to the database-specific documentation for more details:
-
-- [AWS Athena][ref-export-athena]
-- [AWS Redshift][ref-export-redshift]
-- [BigQuery][ref-export-bigquery]
-- [Snowflake][ref-export-snowflake]
+Enabling the export bucket functionality requires extra configuration and is 
+not available for all data sources. Please
+refer to the [database-specific documentation][ref-config-db] for more details. 
+Data sources that support export buckets will have an "Export Bucket" section with more information.
 
 When using cloud storage, it is important to correctly configure any data
 retention policies to clean up the data in the export bucket as Cube does not
@@ -1022,10 +1019,6 @@ of this member. For numeric types, it will most likely be an integer, a float,
 or a decimal type, depending on the nature of your data.
 
 
-[ref-export-athena]: /product/configuration/data-sources/aws-athena#export-bucket
-[ref-export-redshift]: /product/configuration/data-sources/aws-redshift#export-bucket
-[ref-export-bigquery]: /product/configuration/data-sources/google-bigquery#export-bucket
-[ref-export-snowflake]: /product/configuration/data-sources/snowflake#export-bucket
 [ref-caching-in-mem-default-refresh-key]: /product/caching#default-refresh-keys
 [ref-config-db]: /product/configuration/data-sources
 [ref-config-driverfactory]: /reference/configuration/config#driverfactory
@@ -1066,4 +1059,4 @@ or a decimal type, depending on the nature of your data.
 [ref-matching-preaggs]: /product/caching/matching-pre-aggregations
 [ref-cube-store]: /product/caching/running-in-production#architecture
 [ref-cube-store-storage]: /product/caching/running-in-production#storage
-[ref-member-sql]: /reference/data-model/dimensions#sql
+[ref-member-sql]: /reference/data-model/dimensions#sql