Revert "Chore: move to node 18 (#58570)" (#58754)

This reverts commit 0a9129cf90.

scripts/drone/steps/lib.star

@@ -1,7 +1,7 @@
 load('scripts/drone/vault.star', 'from_secret', 'github_token', 'pull_secret', 'drone_token', 'prerelease_bucket')
 
 grabpl_version = 'v3.0.16'
-build_image = 'grafana/build-container:1.6.5'
+build_image = 'grafana/build-container:1.6.4'
 publish_image = 'grafana/grafana-ci-deploy:1.3.3'
 deploy_docker_image = 'us.gcr.io/kubernetes-dev/drone/plugins/deploy-image'
 alpine_image = 'alpine:3.15.6'