Prepare release 3.5.1 (#1006)

Update changelog
Update .go-version to 1.24.9
Updated compliance test and test packages

Author: teresaromero

.buildkite/pipeline.trigger.compliance.tests.sh

@@ -28,7 +28,7 @@ steps:
 EOF
 
 # Generate each test we want to do.
-compliance_test 9.2.0-SNAPSHOT 3.5.0
+compliance_test 9.3.0-SNAPSHOT 3.5.1
 compliance_test 8.19.3 3.4.2
 compliance_test 9.0.6 3.3.5
 compliance_test 8.14.0 3.1.5

.go-version

@@ -1 +1 @@
-1.24.7
+1.24.9

spec/changelog.yml

@@ -15,7 +15,7 @@
     - description: Require defining agent version constraints in input and integration packages.
       type: breaking-change
       link: https://github.com/elastic/package-spec/pull/999
-- version: 3.5.1-next
+- version: 3.5.1
   changes:
     - description: Input packages don't require to define fields.
       type: enhancement