chore(ci) sync repository-tools from libdatadog-build

[gh-worker-campaigns-3e9aa4]

Syncs the shared repository-tools from libdatadog-build:

• .devcontainer/devcontainer.mk (make fragment — hashing, local dev targets)
• .gitlab/devcontainer.yml (CI include — build / nydusify / publish)
• mirror-images.sh (uv wrapper around mirror_images.py, CA-URL pinned)

Both files are verbatim copies — edits here will be overwritten
on the next campaigner run. Edit upstream in libdatadog-build
instead.

Wiring

Your .gitlab-ci.yml needs:

variables:
  DEVCONTAINER_REPO_NAME: <this-repo>
include:
  - local: .gitlab/devcontainer.yml

plus two sidecars you own: .devcontainer/Dockerfile and
.devcontainer/context.files (rsync --files-from list).

Source: https://github.com/DataDog/libdatadog-build/tree/main/repository-tools/sync

Recent changes:
(test run on httpd-datadog only — adds mirror-images.sh wrapper)

[datadog-prod-us1-4]

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 51.08% (+0.00%)

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