…on (elastic#195368)

## Summary

Adjusted forbidden message for new security route configuration to be
consistent with ES.

__Closes: https://github.com/elastic/kibana/issues/195365__

(cherry picked from commit 2759994)

…guration (#195368) (#195761)

# Backport

This will backport the following commits from `main` to `8.x`:
- [[Authz] Adjusted forbidden message for new security route
configuration (#195368)](#195368)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Adjusted forbidden message for new security route configuration
(#195368)\n\n## Summary\r\n\r\nAdjusted forbidden message for new
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Adjusted forbidden message for new security route
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Adjusted forbidden message for new security route configuration
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security route configuration to be\r\nconsistent with
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Adjusted forbidden message for new security route configuration
(#195368)\n\n## Summary\r\n\r\nAdjusted forbidden message for new
security route configuration to be\r\nconsistent with
ES.\r\n\r\n\r\n__Closes:
https://github.com/elastic/kibana/issues/195365__","sha":"2759994e2d53b294a3a049f69bd56fc2e8477e77"}}]}]
BACKPORT-->

Co-authored-by: Elena Shostak <165678770+elena-shostak@users.noreply.github.com>