[8.0] Hide Enterprise search panel when no nodes are present (#127100)

[kibanamachine]

Backport

This will backport the following commits from main to 8.0:

• Hide Enterprise search panel when no nodes are present (#127100)

Questions ?

Please refer to the Backport tool documentation

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 73a993c
• Storybooks Preview

Test Failures

• [job] [logs] Default Accessibility Tests / machine learning embeddables anomaly charts with multi metric job can open job selection flyout

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
monitoring	473.9KB	473.9KB	+25.0B

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @matschaffer