Switch integration tests to newer Swift test matrix #124

Job	Run time
Construct integration matrix	3s
macOS tests / Construct Darwin matrix	4s
Unit tests / Construct unit test matrix	3s
Soundness / API breakage check	56s
Soundness / Broken symlinks check	2s
Soundness / Documentation check	1m 6s
Soundness / Format check	40s
Soundness / License headers check	6s
Soundness / Shell check	44s
Soundness / Unacceptable language check	6s
Soundness / YAML lint check	5s
Soundness / Python lint check	4s
Static SDK / Static SDK / Linux (latest-release Jammy)	2m 29s
Static SDK / Static SDK / Linux (main Jammy)	2m 10s
Unit tests / Unit tests / Linux (5.9)	45s
Unit tests / Unit tests / Linux (5.10)	42s
Unit tests / Unit tests / Linux (6.0)	55s
Unit tests / Unit tests / Linux (nightly-next)	1m 0s
Unit tests / Unit tests / Linux (nightly-main)	1m 8s
Unit tests / Unit tests / Windows (6.0)	3m 37s
Unit tests / Unit tests / Windows (nightly-next)	3m 36s
Unit tests / Unit tests / Windows (nightly-main)	3m 41s
macOS tests / Xcode 16.1	4m 14s
macOS tests / Xcode 16.2	5m 40s
macOS tests / Xcode 16.3	4m 11s
Integration test / Linux (5.9)	30s
Integration test / Linux (5.10)	38s
Integration test / Linux (6.0)	32s
Integration test / Linux (nightly-next)	48s
	40m 35s

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