Preview Data Sources prefixed by workspace UUID's cannot be identified as "Preview". Need to tweak naming to make it obvious so Designer restart can restore that knowledge.

Preview VDb's have a "preview" property in the archive which makes identifying it as Preview in Designer easy. Data Sources have no structure/info in Designer, just a name, so the TeiidDataSource.isPreview() needs to be set somehow during re-start to appropriately "hide" the Preview Data Sources.

So let's add a Prefix or something to the Preview Data Source name. Examples....

PVDB_77f2cb87-c46c-4a1e-a93e-0fe65bff24a0_TestImportPreview_PartsOracle
or
77f2cb87-c46c-4a1e-a93e-0fe65bff24a0_PVDB_TestImportPreview_PartsOracle