* ECS audit logging

* Apply suggestions from code review

Co-authored-by: Larry Gregory <larry.gregory@elastic.co>

* Update x-pack/plugins/security/server/authentication/audit_events.ts

Co-authored-by: Larry Gregory <larry.gregory@elastic.co>

* Update docs/settings/security-settings.asciidoc

Co-authored-by: Larry Gregory <larry.gregory@elastic.co>

* remove audit trail service from core

* fix test

* Updated docs and added beta warning

* Added dev docs

* Tweaks

* Plugin list changes

* Apply suggestions from technical writers

Co-authored-by: Kaarina Tungseth <kaarina.tungseth@elastic.co>

* Added docs suggestion

* Added api integration tests

* Added suggestions from platform team

* Update x-pack/plugins/security/server/audit/audit_service.test.ts

Co-authored-by: Joe Portner <5295965+jportner@users.noreply.github.com>

* Update x-pack/plugins/security/server/audit/audit_service.test.ts

Co-authored-by: Joe Portner <5295965+jportner@users.noreply.github.com>

* Update x-pack/plugins/security/server/audit/audit_service.test.ts

Co-authored-by: Joe Portner <5295965+jportner@users.noreply.github.com>

* Update docs/user/security/audit-logging.asciidoc

Co-authored-by: Joe Portner <5295965+jportner@users.noreply.github.com>

* Update docs/settings/security-settings.asciidoc

Co-authored-by: Joe Portner <5295965+jportner@users.noreply.github.com>

* Update x-pack/plugins/security/server/config.ts

Co-authored-by: Joe Portner <5295965+jportner@users.noreply.github.com>

* Added suggestions from PR

* Grouped events table

* Update x-pack/plugins/security/server/audit/audit_events.ts

Co-authored-by: Larry Gregory <larry.gregory@elastic.co>

* Update x-pack/plugins/security/server/audit/audit_events.ts

Co-authored-by: Larry Gregory <larry.gregory@elastic.co>

* Fixed ECS version number in docs

Co-authored-by: Larry Gregory <larry.gregory@elastic.co>

* Added suggestions from code review

* Removed beta

* Added suggestions from code review

Co-authored-by: Larry Gregory <larry.gregory@elastic.co>
Co-authored-by: Kaarina Tungseth <kaarina.tungseth@elastic.co>
Co-authored-by: Joe Portner <5295965+jportner@users.noreply.github.com>
# Conflicts:
#	x-pack/plugins/security/server/config.test.ts
#	x-pack/scripts/functional_tests.js