[CI] Adopt GitHub Actions #4

Job	Run time
Soundness / Format check	42s
Soundness / Broken symlinks check	3s
Soundness / API breakage check	3m 15s
Soundness / Documentation check	36s
Soundness / License headers check	8s
Soundness / Unacceptable language check	4s
Soundness / Python lint check	6s
Soundness / YAML lint check	4s
Soundness / Shell check	39s
Cxx interop / Cxx interop / Windows (6.0)	2s
Cxx interop / Cxx interop / Linux (5.9)	1m 25s
Cxx interop / Cxx interop / Windows (nightly-6.0)	2s
Cxx interop / Cxx interop / Linux (5.10)	1m 27s
Cxx interop / Cxx interop / Windows (nightly-main)	1s
Cxx interop / Cxx interop / Linux (6.0)	1m 28s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 54s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 55s
Unit tests / Unit tests / Linux (5.9)	2m 20s
Unit tests / Unit tests / Linux (5.10)	2m 26s
Unit tests / Unit tests / Windows (6.0)	3s
Unit tests / Unit tests / Linux (6.0)	2m 34s
Unit tests / Unit tests / Windows (nightly-6.0)	4s
Unit tests / Unit tests / Linux (nightly-6.0)	3m 18s
Unit tests / Unit tests / Windows (nightly-main)	3s
Unit tests / Unit tests / Linux (nightly-main)	3m 14s
	27m 53s

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