Migrate to Swift Testing #32

Job	Run time
Cxx interop / Construct Cxx interop matrix	3s
Unit tests / Construct unit test matrix	2s
Soundness / API breakage check	2m 19s
Soundness / Documentation check	0s
Soundness / Unacceptable language check	3s
Soundness / Broken symlinks check	3s
Soundness / License headers check	0s
Soundness / Format check	0s
Soundness / Python lint check	5s
Soundness / Shell check	0s
Soundness / YAML lint check	0s
Unit tests / Unit tests / Linux (5.9)	1m 21s
Unit tests / Unit tests / Linux (5.10)	1m 19s
Unit tests / Unit tests / Linux (6.0)	1m 38s
Unit tests / Unit tests / Linux (nightly-6.1)	1m 52s
Unit tests / Unit tests / Linux (nightly-main)	1m 32s
Cxx interop / Cxx interop / Linux (5.9)	1m 19s
Cxx interop / Cxx interop / Linux (5.10)	1m 20s
Cxx interop / Cxx interop / Linux (6.0)	1m 30s
Cxx interop / Cxx interop / Linux (nightly-6.1)	1m 48s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 35s
	17m 49s

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