Migrate deprecated GitLab runner tags

- runner:main → arch:amd64
- runner:docker → docker-in-docker:amd64

Ref: https://groups.google.com/a/datadoghq.com/g/human.devs/c/ZDV5kkbFXLA

Author: gh-worker-engraver-d31c25[bot]

.gitlab/generate-package.php

@@ -1431,7 +1431,7 @@
 "bundle for reliability env":
   stage: shared-pipeline
   image: registry.ddbuild.io/ci/libdatadog-build/ci_docker_base:67145216
-  tags: [ "arch:amd64", "size:large" ]
+  tags: [ "arch:amd64" ]
   rules:
     - if: $CI_PIPELINE_SOURCE == "schedule" && $NIGHTLY
       when: on_success