singularity/apptainer: simplify version checks & strengthen tests #2759

Job	Run time
Linters (shellcheck)	12s
Linters (lintreadme)	16s
Linters (pydocstyle)	18s
build_test_container	10m 22s
cwltool release test	14m 55s
Test on macos-latest	3m 15s
No leftovers	3m 10s
Tox (3, 10, bandit)	43s
Tox (3, 10, lint)	40s
Tox (3, 10, unit)	5m 47s
Tox (3, 11, lint)	36s
Tox (3, 10, mypy)	8m 14s
Tox (3, 11, unit)	5m 38s
Tox (3, 12, unit)	5m 47s
Tox (3, 12, bandit)	29s
Tox (3, 12, mypy)	7m 46s
Tox (3, 13, unit)	5m 53s
Tox (3, 13, lint)	40s
Tox (3, 11, mypy)	7m 33s
Tox (3, 12, lint)	36s
Tox (3, 14, bandit)	35s
Tox (3, 14, mypy)	8m 10s
Tox (3, 13, mypy)	8m 6s
Tox (3, 14, unit)	4m 5s
CWL conformance (v1.0, docker)	6m 49s
Tox (3, 13, bandit)	32s
Tox (3, 14, lint)	36s
Tox (3, 11, bandit)	31s
CWL conformance (v1.1, podman)	7m 43s
CWL conformance (v1.0, podman)	6m 59s
CWL conformance (v1.1, docker)	7m 51s
CWL conformance (v1.2, singularity)	8m 53s
CWL conformance (v1.1, singularity)	7m 55s
CWL conformance (v1.2, docker, --fast-parser)	8m 47s
CWL conformance (v1.0, singularity)	6m 57s
CWL conformance (v1.3.0-dev1, --relax-path-checks)	7m 0s
CWL conformance (v1.2, podman)	9m 3s
CWL conformance (v1.2, docker)	9m 2s
	3h 12m 24s

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