Wizard: feature flag to decide environments to be enabled in

Feature flags now support enablement in Preview specifically.
This allows us to use single feature flag for rollout.

src/Components/CreateImageWizardV2/CreateImageWizard.tsx

@@ -10,6 +10,7 @@ import {
   useWizardContext,
 } from '@patternfly/react-core';
 import { useNavigate, useSearchParams } from 'react-router-dom';
+import { useFlag } from '@unleash/proxy-client-react';
 
 import DetailsStep from './steps/Details';
 import FileSystemStep, { FileSystemContext } from './steps/FileSystem';
@@ -63,7 +64,6 @@ import {
   selectUseLatest,
 } from '../../store/wizardSlice';
 import { resolveRelPath } from '../../Utilities/path';
-import useBetaFlag from '../../Utilities/useBetaFlag';
 import { useGetEnvironment } from '../../Utilities/useGetEnvironment';
 import { ImageBuilderHeader } from '../sharedComponents/ImageBuilderHeader';
 
@@ -135,7 +135,7 @@ const CreateImageWizard = ({ isEdit }: CreateImageWizardProps) => {
 
   // =========================TO REMOVE=======================
 
-  const isFirstBootEnabled = useBetaFlag('image-builder.firstboot.enabled');
+  const isFirstBootEnabled = useFlag('image-builder.firstboot.enabled');
   // IMPORTANT: Ensure the wizard starts with a fresh initial state
   useEffect(() => {
     dispatch(initializeWizard());

src/Components/CreateImageWizardV2/steps/Review/ReviewStep.tsx

@@ -9,6 +9,7 @@ import {
   useWizardContext,
 } from '@patternfly/react-core';
 import { ArrowRightIcon } from '@patternfly/react-icons';
+import { useFlag } from '@unleash/proxy-client-react';
 
 import {
   ContentList,
@@ -37,7 +38,6 @@ import {
   selectProfile,
   selectRegistrationType,
 } from '../../../../store/wizardSlice';
-import useBetaFlag from '../../../../Utilities/useBetaFlag';
 
 const Review = ({ snapshottingEnabled }: { snapshottingEnabled: boolean }) => {
   const { goToStepById } = useWizardContext();
@@ -99,7 +99,7 @@ const Review = ({ snapshottingEnabled }: { snapshottingEnabled: boolean }) => {
     goToStepById(stepId);
   };
 
-  const isFirstBootEnabled = useBetaFlag('image-builder.firstboot.enabled');
+  const isFirstBootEnabled = useFlag('image-builder.firstboot.enabled');
   return (
     <>
       <ExpandableSection