Removed Search UI access for Editor role

[JasonStoltz]

Summary

This PR disables access for Editors to the Search UI page in Kibana only.

The Search UI page now requires the ability to view credentials because it posts a Search API Key to ent-search to generate a preview.

Editors do not have this access. For that reason Search UI does NOT work for that role in the Kibana Plugin.

Because Editors should still have access to this page in ent-search, I did not want to remove access for that role entirely; I only want to remove access in Kibana.

For this reason, I chose to change the Search UI permission check to check both that the role has the Manage Search UI permission AND the View Credentials permission.

All other roles should remain unaffected.

Here is a screenshot comparing 7.14 ent-search and kibana, note that Editors still have access in ent-search but not in Kibana:

Checklist

• Unit or functional tests were updated or added to match the most common scenarios

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[JasonStoltz]

Hey @spalger , I'd like this to backport to 7.14 also. SO I'd need 7.15 and 7.14 no?

[spalger]

@JasonStoltz sounds good, just doing general maintenance to all PRs open targeting 7.14 without targeting 7.15 to make sure that PRs aren't accidentally backported to 7.14 without being backported to the 7.x branch. You and your reviewers ultimately make the call about where it goes 👍

[JasonStoltz]

Makes sense, thanks! 👍

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: a2735e9
• Storybooks Preview

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
enterpriseSearch	2.1MB	2.1MB	+158.0B

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