skip installation of CUDA into host_injections when testing `install_software_layer.sh` #999

	# documentation: https://help.github.com/en/articles/workflow-syntax-for-github-actions
	name: Tests
	on: [push, pull_request]
	permissions:
	contents: read # to fetch code (actions/checkout)
	jobs:
	build:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	python: [3.6, 3.7, 3.8, 3.9, '3.10']
	fail-fast: false
	steps:
	- name: checkout
	uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

	- name: set up Python
	uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
	with:
	python-version: ${{matrix.python}}
	architecture: x64

	- name: install Python packages
	run: \|
	pip install archspec==0.2.2

	- name: test eessi_software_subdir.py script
	run: \|
	./eessi_software_subdir.py \| tee out
	grep '^x86_64/' out
	egrep '/intel/\|/amd/' out

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