feat: remove resource_group (concurrency limiting)

Now that we build with unique tags, there shouldn't be any cross talk anymore.

containers/dind/Dockerfile

-FROM ubuntu:22.04
-LABEL maintainer="Whitney Armstrong <warmstrong@anl.gov>" \
-      name="ubuntu_dind" \
-      group="ubuntu_dind" \
-      march="native" \
-      base="ubuntu" \
-      version="22.04"
-
-RUN apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y \
-    apt-transport-https \
-    binfmt-support \
-    build-essential \
-    ca-certificates \
-    cryptsetup \
-    curl \
-    gettext \
-    git \
-    iptables \
-    libglib2.0-dev \
-    libgpgme11-dev \
-    libseccomp-dev \
-    libssl-dev \
-    lxc \
-    make \
-    pkg-config \
-    qemu \
-    qemu-user-static \
-    uuid-dev \
-    squashfs-tools \
-    wget
-
-# Install Go
-ARG GO_OS=linux
-ARG GO_ARCH=amd64
-ARG GO_VERSION=1.20.5
-ARG GO_URL=https://dl.google.com/go/go${GO_VERSION}.${GO_OS}-${GO_ARCH}.tar.gz
-RUN curl -L ${GO_URL} | tar -C /usr/local -xzvf -
-
-# Install Singularity CE
-ARG SINGULARITY_VERSION=3.11.4
-ARG SINGULARITY_URL=https://github.com/sylabs/singularity/releases/download/v${SINGULARITY_VERSION}/singularity-ce-${SINGULARITY_VERSION}.tar.gz
-RUN curl -L ${SINGULARITY_URL} | tar -C /tmp -xzf - \
- && cd /tmp/singularity-ce-${SINGULARITY_VERSION} \
- && export PATH=/usr/local/go/bin:$PATH \
- && ./mconfig \
- && make -C builddir \
- && make -C builddir install \
- && rm -rf /tmp/singularity-ce-${SINGULARITY_VERSION}
-
-# Install Docker
-ARG DOCKER_VERSION=24
-ADD https://get.docker.com/ /tmp/get-docker.sh
-RUN bash /tmp/get-docker.sh --version ${DOCKER_VERSION}
-
-# Install the magic wrapper.
-ADD --chmod=0755 wrapdocker /usr/local/bin/wrapdocker
-
-# Define additional metadata for our image.
-VOLUME /var/lib/docker
-CMD ["wrapdocker"]