podman-compose/tests/multicompose

Multiple compose files

to make sure we get results similar to

docker-compose -f d1/docker-compose.yml -f d2/docker-compose.yml up -d
docker exec -ti d1_web1_1 sh -c 'set'
docker exec -ti d1_web2_1 sh -c 'set'
curl http://${d1_web1_1}:8001/index.txt
curl http://${d1_web1_1}:8002/index.txt

we need to verify

• project base directory and project name is d1
• var12='d1/12.env' which means enf_file was appended not replaced (which means that we normalize to array before merge)
• var2='d1/2.env' which means that paths inside d2/docker-compose.yml directory are relative to d1