[CI] Disabled Github triggers for extended testing

catalog-info.yaml

@@ -84,16 +84,10 @@ spec:
       name: elastic-agent-extended-testing
       description: Buildkite pipeline for the Elastic Agent extended testing
     spec:
-      branch_configuration: "main 7.* 8.* v7.* v8.*"
       repository: elastic/elastic-agent
       pipeline_file: ".buildkite/integration.pipeline.yml"
       provider_settings:
-        build_pull_request_forks: false
-        build_pull_requests: true
-        build_tags: true
-        filter_enabled: true
-        filter_condition: >-
-          build.pull_request.id == null || (build.creator.name == 'elasticmachine' && build.pull_request.id != null)
+        trigger_mode: none # don't trigger jobs from github activity
       cancel_intermediate_builds: true
       cancel_intermediate_builds_branch_filter: "!main !7.* !8.* !9.*"
       skip_intermediate_builds: true