argparse: colorize the `--help` output with rich-argparse #2426

Job	Run time
No leftovers	3m 0s
CWL conformance (v1.0, docker)	8m 44s
build_test_container	10m 20s
CWL conformance (v1.0, singularity)	7m 5s
cwltool release test	13m 1s
CWL conformance (v1.0, podman)	6m 33s
CWL conformance (v1.1, docker)	7m 30s
Linters (lintreadme)	29s
CWL conformance (v1.1, singularity)	7m 37s
Tox (3, 9, lint)	27s
Linters (shellcheck)	12s
Test on macos-latest	6m 24s
CWL conformance (v1.1, podman)	8m 2s
Tox (3, 9, unit)	5m 1s
Linters (pydocstyle)	18s
CWL conformance (v1.2, docker)	9m 5s
Tox (3, 9, bandit)	24s
CWL conformance (v1.2, singularity)	9m 20s
Tox (3, 9, mypy)	6m 57s
CWL conformance (v1.2, podman)	9m 18s
Tox (3, 10, lint)	27s
CWL conformance (v1.2, docker, --fast-parser)	9m 0s
Tox (3, 10, unit)	4m 56s
CWL conformance (v1.3.0-dev1, --relax-path-checks)	5m 54s
Tox (3, 10, bandit)	22s
Tox (3, 10, mypy)	6m 50s
Tox (3, 11, lint)	29s
Tox (3, 11, unit)	4m 42s
Tox (3, 11, bandit)	21s
Tox (3, 11, mypy)	6m 37s
Tox (3, 12, lint)	32s
Tox (3, 12, unit)	6m 8s
Tox (3, 12, bandit)	26s
Tox (3, 12, mypy)	7m 4s
Tox (3, 13, lint)	38s
Tox (3, 13, unit)	6m 36s
Tox (3, 13, bandit)	38s
Tox (3, 13, mypy)	1m 8s
	3h 2m 35s

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