Add a workflow to concretize using the latest release of spack #1

	on:
	push:
	branches:
	- main
	pull_request:
	workflow_dispatch:

	jobs:
	concretize:
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}-${{ matrix.image }}-${{ matrix.build_type }}
	cancel-in-progress: true
	strategy:
	matrix:
	image: [alma9, ubuntu22]
	build_type: [release, nightly]
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Start container
	run: \|
	name=$(echo "${{ github.event.repository.name }}" \| tr '[:upper:]' '[:lower:]')
	if [ "${{ matrix.image }}" = "alma9" ]; then
	docker run --name container --privileged -v ${GITHUB_WORKSPACE}:/key4hep-spack -v ~/.cache/ccache:/root/.cache/ccache -d ghcr.io/key4hep/key4hep-images/alma9-cvmfs tail -f /dev/null
	elif [ "${{ matrix.image }}" = "ubuntu22" ]; then
	docker run --name container --privileged -v ${GITHUB_WORKSPACE}:/key4hep-spack -v ~/.cache/ccache:/root/.cache/ccache -d ghcr.io/key4hep/key4hep-images/ubuntu22-cvmfs tail -f /dev/null
	else
	echo "Unknown image"
	exit 1
	fi

	- name: Setup environment and concretize
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|

	export GITHUB_TOKEN=${GH_TOKEN}

	cat <<'EOF' > ${GITHUB_WORKSPACE}/script_container.sh
	set -e

	/key4hep-spack/ci/concretize-latest-spack.sh

	EOF

	chmod +x ${GITHUB_WORKSPACE}/script_container.sh

	# cat ${GITHUB_WORKSPACE}/script_container.sh

	docker exec container /bin/bash -c "/mount.sh && /key4hep-spack/script_container.sh"

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