mypy 1.6.0 fixes, test new type inference #1800

Job	Run time
build_test_container	11m 38s
No leftovers	7m 20s
CWL conformance (v1.0, docker)	4m 4s
CWL conformance (v1.0, singularity)	4m 1s
CWL conformance (v1.0, podman)	3m 41s
cwltool release test	15m 19s
Test on macos-latest	8m 20s
CWL conformance (v1.1, docker)	5m 33s
CWL conformance (v1.1, singularity)	8m 21s
CWL conformance (v1.1, podman)	6m 47s
Linters (lintreadme)	53s
CWL conformance (v1.2, docker)	6m 25s
Tox (3, 8, lint)	35s
Linters (shellcheck)	21s
CWL conformance (v1.2, singularity)	8m 52s
Tox (3, 8, unit)	11m 29s
Linters (pydocstyle)	30s
CWL conformance (v1.2, podman)	7m 1s
Tox (3, 8, bandit)	43s
CWL conformance (v1.2, docker, --fast-parser)	6m 15s
Tox (3, 8, mypy)	10m 50s
Tox (3, 9, lint)	40s
Tox (3, 9, unit)	9m 25s
Tox (3, 9, bandit)	34s
Tox (3, 9, mypy)	11m 8s
Tox (3, 10, lint)	36s
Tox (3, 10, unit)	10m 3s
Tox (3, 10, bandit)	42s
Tox (3, 10, mypy)	11m 1s
Tox (3, 11, lint)	41s
Tox (3, 11, unit)	11m 28s
Tox (3, 11, bandit)	32s
Tox (3, 11, mypy)	9m 58s
Tox (3, 12, lint)	57s
Tox (3, 12, unit)	11m 46s
Tox (3, 12, bandit)	44s
Tox (3, 12, mypy)	1m 32s
	3h 30m 45s

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