Better name for Search Indexer DataSource

[bryevdv]

Currently to create a SearchIndexer you must first create a DataSource that desribes a connection to some external data source to be indexed (e.g. data in Azure blob storage). Nearly every UX study participant was confused by this, and thought e.g. that the DataSource object was somehow the external data source (rather than a description of if) or that blob storage clients could be passed directly to the search indexer.

Has been suggested a different name could help make the purpose of this model more evident.

• DataSourceConnection
• DataSourceRelation
• DataSourceDescription

For further work, perhaps it would make sense to see if e.g. a blob storage client could just be accepted directly (this was asked for by at least one participant)

cc @xiangyan99 @heaths and this will probably need to be taken up with the team and @brjohnstmsft

[brjohnstmsft]

FWIW I like DataSourceConnection. Adding @bleroy for his opinion.

[heaths]

I like "connection", although, that should be SearchIndexerDataSourceConnection given the naming convention we already established.

[heaths]

I opened #11565 which includes this (similar bugs opened across other languages).