Specify ouiaId to use as selector for testing

see release_select for ImageOutputReleaseSelect for example

src/Components/CreateImageWizard/formComponents/AWSSourcesSelect.js

@@ -65,6 +65,7 @@ export const AWSSourcesSelect = ({
         className={className}
       >
         <Select
+          ouiaId="source_select"
           variant={SelectVariant.typeahead}
           onToggle={handleToggle}
           onSelect={handleSelect}