Switch integration tests to newer Swift test matrix #126

Job	Run time
Construct integration matrix	5s
macOS tests / Construct Darwin matrix	2s
Unit tests / Construct unit test matrix	3s
Soundness / API breakage check	59s
Soundness / Documentation check	1m 6s
Soundness / Broken symlinks check	5s
Soundness / License headers check	4s
Soundness / Unacceptable language check	3s
Soundness / Format check	1m 3s
Soundness / Python lint check	5s
Soundness / Shell check	39s
Soundness / YAML lint check	4s
Static SDK / Static SDK / Linux (latest-release Jammy)	2m 22s
Static SDK / Static SDK / Linux (main Jammy)	2m 13s
macOS tests / Xcode 16.1	1m 34s
macOS tests / Xcode 16.2	6m 5s
macOS tests / Xcode 16.3	8m 2s
Unit tests / Unit tests / Linux (5.9)	43s
Unit tests / Unit tests / Linux (5.10)	44s
Unit tests / Unit tests / Linux (6.0)	52s
Unit tests / Unit tests / Linux (nightly-next)	1m 1s
Unit tests / Unit tests / Linux (nightly-main)	1m 9s
Unit tests / Unit tests / Windows (6.0)	17m 0s
Unit tests / Unit tests / Windows (nightly-next)	9m 50s
Unit tests / Unit tests / Windows (nightly-main)	11m 1s
Integration test / Linux (5.9)	1m 41s
Integration test / Linux (5.10)	1m 48s
Integration test / Linux (6.0)	2m 4s
Integration test / Linux (nightly-next)	2m 28s
	1h 14m 55s

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