Changelog for 8.10.4 (#3606) (#3619)

* Changelog for 8.10.4

* Update changelog/8.10.4.asciidoc

Co-authored-by: David Kilfoyle <[email protected]>

---------

Co-authored-by: David Kilfoyle <[email protected]>
(cherry picked from commit 22938b1)

# Conflicts:
#	changelog/fragments/1693427183-install-progress.yaml

Co-authored-by: Pierre HILBERT <[email protected]>

changelog/8.10.4.asciidoc

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+// begin 8.10.4 relnotes
+
+[[release-notes-8.10.4]]
+==  8.10.4
+
+Review important information about the  8.10.4 release.
+
+
+
+[discrete]
+[[breaking-changes-8.10.4]]
+=== Breaking changes
+
+Breaking changes can prevent your application from optimal operation and
+performance. Before you upgrade, review the breaking changes, then mitigate the
+impact to your application.
+
+elastic-agent::
+
+[discrete]
+[[breaking-3591]]
+.`elastic-agent-autodiscover` library has been updated to version 0.6.4, disabling metadata For `kubernetes.deployment` and `kubernetes.cronjob` fields.
+[%collapsible]
+====
+*Details* +
+The `elastic-agent-autodiscover` Kubernetes library by default comes with `add_resource_metadata.deployment=false` and `add_resource_metadata.cronjob=false`.
+*Impact* +
+Pods that will be created from deployments or cronjobs will not have the extra metadata field for `kubernetes.deployment` or `kubernetes.cronjob`, respectively. This change was made to avoid the memory impact of keeping the feature enabled in big Kubernetes clusters.
+For more information, refer to {agent-pull}3591[#3591].
+====
+
+
+
+
+
+[discrete]
+[[new-features-8.10.4]]
+=== New features
+
+The 8.10.4 release adds the following new and notable features.
+
+
+elastic-agent::
+
+* Secondary Fallback For Package Signature Verification. {elastic-agent-pull}https://github.com/elastic/elastic-agent/pull/3453[#https://github.com/elastic/elastic-agent/pull/3453] {elastic-agent-issue}https://github.com/elastic/elastic-agent/issues/3264[#https://github.com/elastic/elastic-agent/issues/3264]
++
+Ability to upgrade securely in air-gapped environment where fleet server is the only reachable URI.
+
+
+
+
+
+
+
+// end 8.10.4 relnotes

changelog/8.10.4.yaml

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+version: 8.10.4
+entries:
+    - kind: feature
+      summary: Secondary fallback for package signature verification
+      description: Ability to upgrade securely in air-gapped environment where fleet server is the only reachable URI.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/3453
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/3264
+      timestamp: 1695289867
+      file:
+        name: 1695289867-Secondary-fallback-for-package-signature-verification.yaml
+        checksum: 8f8c39d9eef2f5b6922353bcab9c4ee1b74b1378
+    - kind: breaking-change
+      summary: Elastic-agent-autodiscover to v0.6.4. Disables metadata for deployment and cronjob
+      description: Elastic-agent-autodiscover library by default comes with add_resource_metadata.deployment=false and add_resource_metadata.cronjob=false. Pods that will be created from deployments or cronjobs will not have the extra metadata field for kubernetes.deployment or kubernetes.cronjob respectively.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/3591
+      issue: []
+      timestamp: 1697102363
+      file:
+        name: 1697102363-updating_agentautodiscovery_810.yaml
+        checksum: fe9015185dc4d3fe85f9c2ebf9f47e64e26fc67d