Enable DRA for 8.14 on Buildkite (#39321)

This commit enables publishing of DRA artifacts via Buildkite on the `8.14` by switching
the DRY_RUN default to `true.

Additionally it backports the Jenkins changes brought in #39322 that actually disable the
corresponding builds on Jenkins -- this is not really needed as Jenkins reads its configuration only from `main`
but it's done for consistency.

Relates: elastic/ingest-dev#3095, #39322

.buildkite/scripts/dra.sh

@@ -1,21 +1,11 @@
 #!/usr/bin/env bash
 
-# TODO: uncomment out below when Jenkins packaging has been stopped
-# if [[ "$DRY_RUN" == "true" ]]; then
-# echo "~~~ Running in dry-run mode -- will NOT publish artifacts"
-# DRY_RUN="--dry-run"
-# else
-# echo "~~~ Running in publish mode"
-# DRY_RUN=""
-# fi
-
-# TODO: delete the conditional below (and replace it with the above, uncommented out, section) after Jenkins packaging has been stopped
-if [[ "$DRY_RUN" == "false" ]]; then
- echo "~~~ Running in publish mode"
- DRY_RUN=""
-else
+if [[ "$DRY_RUN" == "true" ]]; then
  echo "~~~ Running in dry-run mode -- will NOT publish artifacts"
  DRY_RUN="--dry-run"
+else
+ echo "~~~ Running in publish mode"
+ DRY_RUN=""
 fi
 
 set -euo pipefail

.ci/jobs/packaging.yml

@@ -14,7 +14,7 @@
  discover-pr-forks-trust: 'permission'
  discover-pr-origin: 'merge-current'
  discover-tags: true
- head-filter-regex: '(main|7\.1[6789]|8\.\d+|PR-.*|v\d+\.\d+\.\d+)'
+ head-filter-regex: '(7\.1[6789]|8\.13|PR-.*|v8\.13\.\d+)'
  disable-pr-notifications: true
  notification-context: 'beats-packaging'
  repo: 'beats'
@@ -29,14 +29,11 @@
  ignore-tags-newer-than: 30
  - named-branches:
  - exact-name:
- name: 'main'
+ name: '8.13'
  case-sensitive: true
  - regex-name:
  regex: '7\.1[6789]'
  case-sensitive: true
- - regex-name:
- regex: '8\.\d+'
- case-sensitive: true
  - change-request:
  ignore-target-only-changes: true
  clean:

.pre-commit-config.yaml

@@ -9,4 +9,3 @@ repos:
  hooks:
  - id: check-jenkins-pipelines
  files: ^(.ci/(.*\.groovy|Jenkinsfile)|Jenkinsfile)$
- - id: check-jjbb