[Security Solution] [AI assistant] Hide the default llm and default llm only settings from advanced setting

[KDKHD]

Summary

Summarize your PR. If it involves visual changes include a screenshot or gif.

This PR ensures the genAi default LLM settings do not appear within advanced settings. The settings should only appear within the AI assistant pages.

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

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• ...

[KDKHD]

/ci

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 066f9a5

Failed CI Steps

• FTR Configs #12

Test Failures

• [job] [logs] FTR Configs #12 / Saved objects management should be able to handle multi-space imports correctly imported dashboard into another space should render correctly

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
observabilityAiAssistantManagement	134.5KB	134.4KB	-122.0B
securitySolution	8.9MB	8.9MB	-126.0B
total			-248.0B

[KDKHD]

@elasticmachine merge upstream

[elasticmachine]

CI was triggered for this PR, but this PR targets 9.0 which should not receive a future release. CI is not supported for these branches. Please consult the release schedule, or contact #kibana-operations if you believe this is an error.

The following branches are currently considered to be open:

• main
• 9.2
• 9.1
• 8.19
• 8.18
• 7.17

[elasticmachine]

CI was triggered for this PR, but this PR targets 9.0 which should not receive a future release. CI is not supported for these branches. Please consult the release schedule, or contact #kibana-operations if you believe this is an error.

The following branches are currently considered to be open:

• main
• 9.2
• 9.1
• 8.19
• 8.18
• 7.17