ci: docker: drop the in-tree testbed container

The testbed container now has its own prpl Foundation project, release
pipeline, and versioned registry image. Keeping the old Debian Buster
image in prplos leaves two sources for the same CI runtime and continues
to expose obsolete build, test, and deploy jobs.

Remove the in-tree Dockerfile and its CI job definitions. Drop the root
include because the testbed and CDRouter templates now consume the
external containers/testbed release directly.

Assisted-by: codex:gpt-5
Signed-off-by: Petr Štetiar <petr.stetiar@prplfoundation.org>
References: PPW-1258

.gitlab-ci.yml

@@ -17,7 +17,6 @@ include:
   - local: .gitlab/coverity.yml
   - local: .gitlab/docker.yml
   - local: .gitlab/docker/builder/gitlab.yml
-  - local: .gitlab/docker/testbed/gitlab.yml
   - local: .gitlab/docker/sdk/gitlab.yml
   - local: .gitlab/docker/ib/gitlab.yml
   - local: .gitlab/docker/ib/lcm/gitlab.yml

.gitlab/docker/testbed/Dockerfile

@@ -1,73 +0,0 @@
-FROM debian:buster-slim
-
-ENV DEBIAN_FRONTEND=noninteractive
-
-RUN \
-    apt-get update && \
-    apt-get install --yes --no-install-recommends \
-	curl \
-	etherwake \
-	git-core \
-	iproute2 \
-	iputils-ping \
-	jq \
-	locales \
-	netcat-openbsd \
-	nmap \
-	ntpdate \
-	openssh-client \
-	python3 \
-	python3-pip \
-	sshpass \
-	sudo \
-	tcpdump \
-	xz-utils && \
-    apt-get -y autoremove && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-
-RUN localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
-ENV LANG=en_US.utf8
-
-ENV LABGRID_COMMIT=1ca30de33a1f57eb
-RUN git clone --branch wip/testbed-next https://gitlab.com/prpl-foundation/prplOS/labgrid
-WORKDIR labgrid
-RUN git reset --hard $LABGRID_COMMIT
-
-RUN \
-	python3 -m pip install -U pip==23.2.1 setuptools==47.3.2 setuptools-scm==7.1.0 && \
-	python3 -m pip install -r requirements.txt && \
-	python3 -m pip install -r modbus-requirements.txt && \
-	python3 setup.py install && \
-	rm -fr /labgrid
-
-RUN pip3 install \
-	cdrouter \
-	cram \
-	humanize \
-	jira \
-	'marshmallow<3.0.0' \
-	pyjwt \
-	async-upnp-client \
-	servefile
-
-ENV TMATE_VERSION=2.4.0
-ENV TMATE_SHA256SUM=6e503a1a3b0f9117bce6ff7cc30cf61bdc79e9b32d074cf96deb0264e067a60d
-ENV TMATE_DL_URL=https://github.com/tmate-io/tmate/releases/download
-
-RUN \
-	curl --location --silent \
-	"$TMATE_DL_URL/$TMATE_VERSION/tmate-${TMATE_VERSION}-static-linux-amd64.tar.xz" > tmate.tar.xz && \
-	sha256sum tmate.tar.xz | grep -q "$TMATE_SHA256SUM" && \
-	tar xf tmate.tar.xz --strip-components=1 -C /usr/local/bin && \
-	rm tmate.tar.xz
-
-RUN \
-    echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers && \
-    useradd -c "OpenWrt Testbed" -m -d /home/testbed -G sudo -s /bin/bash testbed
-
-USER testbed
-ENV HOME /home/testbed
-WORKDIR /home/testbed/
-
-VOLUME [ "/home/testbed" ]

.gitlab/docker/testbed/gitlab.yml

@@ -1,22 +0,0 @@
-build Docker image testbed:
-  extends: .build Docker image
-  variables:
-    DOCKER_DOCKERFILE_PATH: .gitlab/docker/testbed
-
-test Docker image testbed:
-  stage: docker test
-  extends: .docker in docker
-  needs: ["build Docker image testbed"]
-  script:
-    - export IMAGE_NAME="$(echo $CI_JOB_NAME | sed 's/test Docker image \(.*\)/\1/')"
-    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
-    - docker pull "$CI_REGISTRY_IMAGE/$CI_DESIGNATED_BRANCH_SLUG/$IMAGE_NAME:$CI_COMMIT_REF_SLUG"
-    - >
-      docker run --rm "$CI_REGISTRY_IMAGE/$CI_DESIGNATED_BRANCH_SLUG/$IMAGE_NAME:$CI_COMMIT_REF_SLUG" sh -c "
-      python3 -c 'import labgrid; import yaml; import jira; import jwt; import cdrouter' && tmate -V
-      "
-
-deploy Docker image testbed:
-  stage: docker deploy
-  extends: .deploy Docker image
-  needs: ["test Docker image testbed"]