[9.0](backport #43029) [main](backport #42980) docs: Prepare Changelo…

…g for 8.17.3 (#43041)

* docs: Prepare Changelog for 8.17.3 (#42980) (#43029)

* docs: Close changelog for 8.17.3

* Remove empty sections and update changelog entries

---------

Co-authored-by: elasticmachine <elasticmachine@elastic.co>
Co-authored-by: Pierre HILBERT <pierre.hilbert@elastic.co>
(cherry picked from commit 1896cda)

Co-authored-by: elastic-vault-github-plugin-prod[bot] <150874479+elastic-vault-github-plugin-prod[bot]@users.noreply.github.com>
(cherry picked from commit ef6b4a6)

# Conflicts:
#	CHANGELOG.asciidoc
#	libbeat/docs/release.asciidoc

* Resolve merge conflict in CHANGELOG.asciidoc

* Resolve merge conflict in release notes

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Pierre HILBERT <pierre.hilbert@elastic.co>
(cherry picked from commit 61a93f0)

# Conflicts:
#	libbeat/docs/release.asciidoc

libbeat/docs/release.asciidoc

@@ -8,6 +8,10 @@ This section summarizes the changes in each release. Also read
 <<breaking-changes>> for more detail about changes that affect
 upgrade.
 
+<<<<<<< HEAD
+=======
+* <<release-notes-9.0.0-beta1>>
+>>>>>>> 61a93f045 ([9.0](backport #43029) [main](backport #42980) docs: Prepare Changelog for 8.17.3 (#43041))
 * <<release-notes-8.17.3>>
 * <<release-notes-8.17.2>>
 * <<release-notes-8.17.1>>