[9.1] (backport #9065) add k8s_leader_elector otel extension (#9243)

* add k8s_leader_elector otel extension (#9065)

(cherry picked from commit 9b447e7)

# Conflicts:
#	NOTICE-fips.txt
#	NOTICE.txt
#	go.mod
#	internal/pkg/otel/README.md
#	internal/pkg/otel/components.go

* fix merge conflicts

---------

Co-authored-by: Roger Coll <[email protected]>

Author: mergify[bot]

NOTICE-fips.txt

@@ -0,0 +1,32 @@
+# Kind can be one of:
+# - breaking-change: a change to previously-documented behavior
+# - deprecation: functionality that is being removed in a later release
+# - bug-fix: fixes a problem in a previous version
+# - enhancement: extends functionality but does not break or fix existing behavior
+# - feature: new functionality
+# - known-issue: problems that we are aware of in a given version
+# - security: impacts on the security of a product or a user’s deployment.
+# - upgrade: important information for someone upgrading from a prior version
+# - other: does not fit into any of the other categories
+kind: feature
+
+# Change summary; a 80ish characters long description of the change.
+summary: Add k8s leader elector Otel extension
+
+# Long description; in case the summary is not enough to describe the change
+# this field accommodate a description without length limits.
+# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
+#description:
+
+# Affected component; usually one of "elastic-agent", "fleet-server", "filebeat", "metricbeat", "auditbeat", "all", etc.
+component: elastic-agent
+
+# PR URL; optional; the PR number that added the changeset.
+# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
+# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
+# Please provide it if you are adding a fragment for a different PR.
+#pr: https://github.com/owner/repo/1234
+
+# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
+# If not present is automatically filled by the tooling with the issue linked to the PR number.
+#issue: https://github.com/owner/repo/1234

NOTICE.txt

@@ -51,6 +51,7 @@ require (
 	github.com/open-telemetry/opentelemetry-collector-contrib/exporter/loadbalancingexporter v0.129.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/bearertokenauthextension v0.129.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/healthcheckextension v0.129.0
+	github.com/open-telemetry/opentelemetry-collector-contrib/extension/k8sleaderelector v0.129.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/observer/k8sobserver v0.129.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/pprofextension v0.129.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/status v0.129.0
@@ -516,7 +517,6 @@ require (
 	github.com/onsi/ginkgo v1.16.5 // indirect
 	github.com/open-telemetry/opamp-go v0.19.1-0.20250423191708-8d78a5169350 // indirect
 	github.com/open-telemetry/opentelemetry-collector-contrib/connector/signaltometricsconnector v0.129.0 // indirect
-	github.com/open-telemetry/opentelemetry-collector-contrib/extension/k8sleaderelector v0.129.0 // indirect
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/observer v0.129.0 // indirect
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/aws/ecsutil v0.129.0 // indirect
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/common v0.129.0 // indirect

changelog/fragments/1752827328-add_k8sleaderelector_extension.yaml

@@ -91,6 +91,7 @@ This section provides a summary of components included in the Elastic Distributi
 | [bearertokenauthextension](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/extension/bearertokenauthextension/v0.129.0/extension/bearertokenauthextension/README.md) | v0.129.0 |
 | [filestorage](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/extension/storage/filestorage/v0.129.0/extension/storage/filestorage/README.md) | v0.129.0 |
 | [healthcheckextension](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/extension/healthcheckextension/v0.129.0/extension/healthcheckextension/README.md) | v0.129.0 |
+| [k8sleaderelector](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/extension/k8sleaderelector/v0.129.0/extension/k8sleaderelector/README.md) | v0.129.0 |
 | [k8sobserver](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/extension/observer/k8sobserver/v0.129.0/extension/observer/k8sobserver/README.md) | v0.129.0 |
 | [memorylimiterextension](https://github.com/open-telemetry/opentelemetry-collector/blob/extension/memorylimiterextension/v0.129.0/extension/memorylimiterextension/README.md) | v0.129.0 |
 | [pprofextension](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/extension/pprofextension/v0.129.0/extension/pprofextension/README.md) | v0.129.0 |

go.mod

@@ -59,6 +59,7 @@ import (
 	// Extensions
 	"github.com/open-telemetry/opentelemetry-collector-contrib/extension/bearertokenauthextension"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/extension/healthcheckextension"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/extension/k8sleaderelector"
 	k8sobserver "github.com/open-telemetry/opentelemetry-collector-contrib/extension/observer/k8sobserver"
 	pprofextension "github.com/open-telemetry/opentelemetry-collector-contrib/extension/pprofextension"
 	filestorage "github.com/open-telemetry/opentelemetry-collector-contrib/extension/storage/filestorage"
@@ -155,6 +156,7 @@ func components(extensionFactories ...extension.Factory) func() (otelcol.Factori
 		}
 
 		extensions := []extension.Factory{
+			k8sleaderelector.NewFactory(),
 			memorylimiterextension.NewFactory(),
 			filestorage.NewFactory(),
 			healthcheckextension.NewFactory(),