[ML] Data Visualizer: Remove import reference for users without import privileges

[peteharverson]

Summary

Removes reference to import the data into an Elasticsearch index from the about screen in the file data visualizer for users without the necessary privileges to import data. Previously the inclusion of this text for all users, regardless of privileges, might have given an incorrect impression that they could import data into an index.

Part of #106617

Users without ability to import data:

Full text displayed for users with ability to import data:

[elasticmachine]

Pinging @elastic/ml-ui (:ml)

[jgowdyelastic]

Code LGTM

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 043141f
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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
dataVisualizer	543.7KB	544.0KB	+279.0B

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

cc @peteharverson

[qn895]

Tested and LGTM 🎉