Apply concurrency control to swift-package-test, cancelling previously running workflows of the same kind #136

Job	Run time
Test with Docker / Linux (5.9 - jammy)	26s
Test with Docker / Linux (5.10 - jammy)	27s
Test with Docker / Linux (6.0 - jammy)	38s
Test with Docker / Linux (6.1 - jammy)	35s
Test with Docker / Linux (nightly-main - jammy)	39s
Test with Docker / Linux (nightly-6.1 - jammy)	36s
Test with Docker / Windows (5.9 - windows-2022)	14m 42s
Test with Docker / Windows (6.0 - windows-2022)	14m 16s
Test with Docker / Windows (6.1 - windows-2022)	14m 22s
Test with Docker / Windows (nightly - windows-2019)	9m 41s
Test with Docker / Windows (nightly-6.1 - windows-2019)	9m 41s
Test without Docker / Linux (${{ matrix.swift_version }} - ${{ matrix.os_version }})	1s
Test without Docker / Windows (${{ matrix.swift_version }} - ${{ ((inputs.enable_windows_docker && contains(matrix.swift_version, 'nightly') && 'windows-2019') \|\| 'windows-2022') }})	1s
Soundness / API breakage check	0s
Soundness / Documentation check	34s
Soundness / License headers check	7s
Soundness / Unacceptable language check	4s
Soundness / Broken symlinks check	3s
Soundness / Format check	0s
Soundness / Python lint check	5s
Soundness / Shell check	34s
Soundness / YAML lint check	6s
	1h 7m 38s

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