Migrate CI to use swiftlang / SwiftNIO common GitHub Actions. #4

Job	Run time
Soundness / Swift license headers check	5s
Soundness / API breakage check	1m 32s
Soundness / Documentation check	1m 19s
Soundness / License headers check	2s
Soundness / Unacceptable language check	3s
Soundness / Broken symlinks check	3s
Soundness / Format check	32s
Soundness / Shell check	37s
Soundness / Python lint check	5s
Soundness / YAML lint check	4s
Cxx interop / Cxx interop / Windows (6.0)	4s
Cxx interop / Cxx interop / Linux (5.9)	24s
Cxx interop / Cxx interop / Linux (5.10)	24s
Cxx interop / Cxx interop / Windows (nightly-6.0)	1s
Cxx interop / Cxx interop / Linux (6.0)	1m 11s
Cxx interop / Cxx interop / Windows (nightly-main)	3s
Unit tests / Unit tests / Linux (5.9)	21s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 20s
Unit tests / Unit tests / Linux (5.10)	26s
Unit tests / Unit tests / Linux (6.0)	1m 16s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 15s
Unit tests / Unit tests / Linux (nightly-6.0)	1m 24s
Unit tests / Unit tests / Linux (nightly-main)	1m 22s
Unit tests / Unit tests / Windows (6.0)	3s
Unit tests / Unit tests / Windows (nightly-6.0)	1s
Unit tests / Unit tests / Windows (nightly-main)	3s
	14m 0s

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