## Summary

This PR adds:
- Graph visualization component using `xyflow`, and layouts the graph
using `dagre`.
- API that supports the graph visualization
- API tests
- Serverless API tests

**List of open issues (will be tracked in a different ticket):**
- Identify if `related.hosts`, `related.ip` and `related.user` are
mapped before the query. (can be fixed by
elastic/elasticsearch#112912)
- Update nodes rendering to match recent figma changes
- Return 404 when feature is not enabled
- Add keyboard accessibility
- Resolve 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))

### How to test

You can view the graph using storybook's
[playground](https://supreme-adventure-8qjmlp1.pages.github.io/graph-storybook/?path=/story/components-graph-components-dagree-layout-graph--graph-stacked-edge-cases).

To test this PR you can run

```
yarn storybook cloud_security_posture_packages
```

To test the API you can use the mocked data

```bash
node scripts/es_archiver load x-pack/test/cloud_security_posture_api/es_archives/logs_gcp_audit \
--es-url http://elastic:changeme@localhost:9200 \
--kibana-url http://elastic:changeme@localhost:5601
```

And through dev tools:

```
POST kbn:/internal/cloud_security_posture/graph?apiVersion=1
{
  "query": {
    "actorIds": ["admin@example.com"],
    "eventIds": [""],
    "start": "now-1y/y",
    "end": "now/d"
  }
}
```

### Checklist

Delete any items that are not applicable to this PR.

- [x] [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
- [x] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [ ] 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))
- [x] 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))
- [x] This was checked for [cross-browser
compatibility](https://www.elastic.co/support/matrix#matrix_browsers)

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
(cherry picked from commit be0eadf)