Set the correct enrollment token in case of multi page layout in k8s manifest (#145098)

## Summary

Setting the correct enrolment token to kubernetes manifest in case of
multi page layout steps when kubernetes has been selected as a platform.


### Checklist

Delete any items that are not applicable to this PR.

- [ ] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [ ] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] Any UI touched in this PR is usable by keyboard only (learn more
about [keyboard accessibility](https://webaim.org/techniques/keyboard/))
- [ ] Any UI touched in this PR does not create any new axe failures
(run axe in browser:
[FF](https://addons.mozilla.org/en-US/firefox/addon/axe-devtools/),
[Chrome](https://chrome.google.com/webstore/detail/axe-web-accessibility-tes/lhdoppojpmngadmnindnejefpokejbdd?hl=en-US))
- [ ] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [ ] This renders correctly on smaller devices using a responsive
layout. (You can test this [in your
browser](https://www.browserstack.com/guide/responsive-testing-on-local-server))
- [ ] This was checked for [cross-browser
compatibility](https://www.elastic.co/support/matrix#matrix_browsers)


Closes https://github.com/elastic/kibana/issues/145072

x-pack/plugins/fleet/public/applications/fleet/sections/agent_policy/create_package_policy_page/multi_page_layout/components/page_steps/install_agent/install_agent_managed.tsx

@@ -64,6 +64,7 @@ export const InstallElasticAgentManagedPageStep: React.FC<InstallAgentPageProps>
     InstallManagedAgentStep({
       installCommand: installManagedCommands,
       apiKeyData: { item: enrollmentAPIKey },
+      enrollToken: enrollmentAPIKey.api_key,
       selectedApiKeyId: enrollmentAPIKey.id,
       isComplete: commandCopied || !!enrolledAgentIds.length,
       fullCopyButton: true,