[Fleet] Add missing permissions callout on integrations setting page

[Supplementing]

Summary

Closes #242656

This PR removes the existing message about installing the integration on the settings page of a package when the user does not have the appropriate permissions to do so, and instead shows a callout letting them know that they don't have the required permissions. This is inline with the existing disabling of the installation button that already exists on the details page.

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
• This was checked for breaking HTTP API changes, and any breaking changes have been approved by the breaking-change committee. The release_note:breaking label should be applied in these situations.
• Flaky Test Runner was used on any tests changed
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines
• Review the backport guidelines and apply applicable backport:* labels.

Identify risks

N/A

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[Supplementing]

@sileschristian We didnt have an existing mockup for this callout, but I tried to align it with the one we use on the configs tab right next to this one. Please let me know if we need any adjustment. In the same token, @vishaangelova please take a look at the copy and let me know if it needs updating. Thanks in advance to you both!

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: 5e3c427

Failed CI Steps

• FTR Configs #105
• FTR Configs #105

Test Failures

• [job] [logs] FTR Configs #105 / Maps endpoints apis search ES|QL should return getColumns response in expected shape
• [job] [logs] FTR Configs #105 / Maps endpoints apis search ES|QL should return getColumns response in expected shape

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
fleet	2.1MB	2.1MB	+563.0B

History