[8.7] Adds Allowlist Elastic Endpoint in third-party antivirus apps page to serverless docs (backport #5639) (#5648)

* Adds Allowlist Elastic Endpoint in third-party antivirus apps page to serverless docs (#5639)

* Adds Allowlist Elastic Endpoint in third-party antivirus apps page to serverless docs

* Adds page description

* Apply suggestions from code review

Co-authored-by: Joe Peeples <[email protected]>

* Removes div id

* Adds note to allowlist pages

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Co-authored-by: Joe Peeples <[email protected]>
(cherry picked from commit f8e7ca6)

# Conflicts:
#	docs/serverless/edr-manage/trusted-apps-ov.mdx
#	docs/serverless/serverless-security.docnav.json

* Delete docs/serverless directory and its contents

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Co-authored-by: natasha-moore-elastic <[email protected]>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: 3 people

docs/management/admin/allowlist-endpoint-3rd-party-av.asciidoc

@@ -1,6 +1,8 @@
 [[allowlist-endpoint-3rd-party-av-apps]]
 = Allowlist Elastic Endpoint in third-party antivirus apps
 
+NOTE: If you use other antivirus (AV) software along with {elastic-defend}, you may need to add the other system as a trusted application in the {security-app}. Refer to <<trusted-apps-ov>> for more information.
+
 Third-party antivirus (AV) applications may identify the expected behavior of {elastic-endpoint} as a potential threat. Add {elastic-endpoint}'s digital signatures and file paths to your AV software's allowlist to ensure {elastic-endpoint} continues to function as intended. We recommend you allowlist both the file paths and digital signatures, if applicable. 
 
 NOTE: Your AV software may refer to allowlisted processes as process exclusions, ignored processes, or trusted processes. It is important to note that file, folder, and path-based exclusions/exceptions are distinct from trusted applications and will not achieve the same result. This page explains how to ignore actions taken by processes, not how to ignore the files that spawned those processes.

docs/management/admin/trusted-apps.asciidoc

@@ -2,6 +2,8 @@
 [chapter, role="xpack"]
 = Trusted applications
 
+NOTE: If you use {elastic-defend} along with other antivirus (AV) software, you might need to configure the other system to trust {elastic-endpoint}. Refer to <<allowlist-endpoint-3rd-party-av-apps>> for more information.
+
 You can add Windows, macOS, and Linux applications that should be trusted, such as other antivirus or endpoint security applications. Trusted applications are designed to help mitigate performance issues and incompatibilities with other endpoint software installed on your hosts. Trusted applications apply only to hosts running the {elastic-defend} integration.
 
 .Requirements