Make sure eessi_container.sh will add --nv flag for the test step, when GPUs are available #3130

	# documentation: https://help.github.com/en/articles/workflow-syntax-for-github-actions
	name: Tests for init scripts
	on:
	push:
	branches: [ "*-software.eessi.io" ]
	pull_request:
	permissions:
	contents: read # to fetch code (actions/checkout)
	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python: [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 pytest

	- name: unit tests for eessi_software_subdir_for_host.py script
	run:
	pytest -v init/test.py

	- name: test eessi_software_subdir_for_host.py script
	env:
	EESSI_X86_64: /tmp/EESSI/software/linux/x86_64
	run: \|
	mkdir -p ${EESSI_X86_64}/intel/{pentium4,sandybridge,haswell,skylake_avx512} ${EESSI_X86_64}/generic
	python3 ./init/eessi_software_subdir_for_host.py /tmp/EESSI > out.txt
	grep '^x86_64/' out.txt

	# check override via $EESSI_SOFTWARE_SUBDIR_OVERRIDE
	export EESSI_SOFTWARE_SUBDIR_OVERRIDE=x86_64/intel/pentium4
	python3 ./init/eessi_software_subdir_for_host.py /tmp/EESSI > out.txt
	grep '^x86_64/intel/pentium4$' out.txt

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