Wizard: Add beta flag for AWS sources

This commit makes the new AWS sources feature only available in beta.

Note that the RTKQ hooks related to AWS sources are called in several
places outside of the AWS Target step (a prefetch on the Image Output
step and useQuery hook on the review step) but have not been hidden
behind beta flags - this should not present any problems and will make
exposing this feature in stable much easier when the time comes.

src/Components/CreateImageWizard/CreateImageWizard.js

@@ -7,7 +7,8 @@ import { useLocation, useNavigate } from 'react-router-dom';
 
 import ImageCreator from './ImageCreator';
 import {
-  awsTarget,
+  awsTargetStable,
+  awsTargetBeta,
   fileSystemConfiguration,
   googleCloudTarger,
   imageName,
@@ -475,6 +476,8 @@ const formStepHistory = (composeRequest) => {
 };
 
 const CreateImageWizard = () => {
+  const awsTarget = insights.chrome.isBeta() ? awsTargetBeta : awsTargetStable;
+
   const dispatch = useDispatch();
   const navigate = useNavigate();
   const location = useLocation();