Migrate CI to use swiftlang / SwiftNIO common GitHub Actions. #5

Job	Run time
Soundness / Check generated code	1m 53s
Soundness / Swift license headers check	4s
Soundness / API breakage check	1m 41s
Soundness / Documentation check	1m 28s
Soundness / Unacceptable language check	3s
Soundness / License headers check	3s
Soundness / Broken symlinks check	2s
Soundness / Format check	40s
Soundness / Shell check	42s
Soundness / YAML lint check	9s
Soundness / Python lint check	7s
Cxx interop / Cxx interop / Linux (5.9)	24s
Cxx interop / Cxx interop / Linux (5.10)	28s
Cxx interop / Cxx interop / Linux (6.0)	1m 21s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 37s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 27s
Cxx interop / Cxx interop / Windows (6.0)	2s
Cxx interop / Cxx interop / Windows (nightly-6.0)	1s
Cxx interop / Cxx interop / Windows (nightly-main)	3s
Unit tests / Unit tests / Linux (5.9)	27s
Unit tests / Unit tests / Linux (5.10)	25s
Unit tests / Unit tests / Linux (6.0)	1m 24s
Unit tests / Unit tests / Linux (nightly-6.0)	1m 41s
Unit tests / Unit tests / Linux (nightly-main)	1m 16s
Unit tests / Unit tests / Windows (6.0)	2s
Unit tests / Unit tests / Windows (nightly-6.0)	3s
Unit tests / Unit tests / Windows (nightly-main)	3s
	17m 36s

Provide feedback