Migrate to GitHub Actions #9

Job	Run time
Unit tests / Unit tests (swift:5.9-jammy, 5.9, true)	3m 10s
Unit tests / Unit tests (swift:5.10-jammy, 5.10, true)	4m 28s
Unit tests / Unit tests (swift:6.0-jammy, 6.0, true)	4m 57s
Unit tests / Unit tests (swiftlang/swift:nightly-6.0-jammy, nightly-6.0, true)	5m 11s
Unit tests / Unit tests (swiftlang/swift:nightly-main-jammy, nightly-main, true)	4m 18s
Cxx interop / Linux (5.9)	1m 59s
Cxx interop / Linux (5.10)	2m 4s
Cxx interop / Linux (6.0)	2m 23s
Cxx interop / Windows (6.0)	1s
Cxx interop / Linux (nightly-6.0)	2m 41s
Cxx interop / Windows (nightly-6.0)	2s
Cxx interop / Linux (nightly-main)	2m 49s
Cxx interop / Windows (nightly-main)	2s
Soundness / API breakage check	0s
Soundness / Broken symlinks check	5s
Soundness / Documentation check	38s
Soundness / License headers check	8s
Soundness / Unacceptable language check	5s
Soundness / Format check	39s
Soundness / Python lint check	0s
Soundness / Shell check	39s
Soundness / YAML lint check	0s
	36m 19s

Provide feedback