feat: [CDE-365]: Send the whole gitspace agent script instead of individual params

[vikyathharekal]

Description

Since we wanted to send more params for container name, tag, image etc, instead of adding so many params, thought of sending the whole script and appending to the existing one in cloudinit.go
To keep it backward compatible, I haven't removed any existing params.
This would be the script coming from CDE Manager with all the replaced values.

groupadd docker
mkdir -p /mnt/disks/mountdevcontainer/gitspace
export DOCKER_API_VERSION={{ .AgentDockerAPIVersion }}

echo "Updating docker root dir"
systemctl stop docker
mkdir -p /mnt/disks/mountdevcontainer/docker
tee /etc/docker/daemon.json <<EOF
{
  "data-root": "/mnt/disks/mountdevcontainer/docker"
}
EOF
systemctl start docker
echo "Successfully updated docker root dir"

echo "starting gitspaces agent"

# Check if the container is present

if docker ps -a --filter "name={{ .AgentContainerName }}" --quiet | grep -q .; then
    echo "Container {{ .AgentContainerName }} exists. Attempting to start it..."

    # Try to start the container
    docker start {{ .AgentContainerName }}
    if [ $? -ne 0 ]; then
        echo "Failed to start {{ .AgentContainerName }}. Deleting and recreating..."
        docker rm -f {{ .AgentContainerName }}
        echo {{ .AgentContainerRegistryToken }} | docker login -u oauth2accesstoken --password-stdin {{ .AgentContainerRegistry }}
        docker run -p 8083:8083 -v /var/run/docker.sock:/var/run/docker.sock -e DOCKER_API_VERSION={{ .AgentDockerAPIVersion }} -e HARNESS_JWT_SECRET={{ .AgentSecret }} -d --name {{ .AgentContainerName }} {{ .AgentImage }}:{{ .AgentTag }}
    else
        echo "{{ .AgentContainerName }} started successfully."
    fi
else
    echo "Container {{ .AgentContainerName }} does not exist. Creating it..."
    echo {{ .AgentContainerRegistryToken }} | docker login -u oauth2accesstoken --password-stdin {{ .AgentContainerRegistry }}
    docker run -p 8083:8083 -v /var/run/docker.sock:/var/run/docker.sock -e DOCKER_API_VERSION={{ .AgentDockerAPIVersion }} -e HARNESS_JWT_SECRET={{ .AgentSecret }} -d --name {{ .AgentContainerName }} {{ .AgentImage }}:{{ .AgentTag }}
    echo "Agent container started."
fi

echo "done starting gitspaces agent"

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