GitHub Actions to parity with existing CI #1

Job	Run time
Soundness / Documentation check	1m 37s
Soundness / API breakage check	1m 57s
Soundness / License headers check	7s
Soundness / Broken symlinks check	3s
Soundness / YAML lint check	5s
Soundness / Unacceptable language check	4s
Soundness / Format check	0s
Soundness / Python lint check	0s
Soundness / Shell check	0s
Cxx interop / Cxx interop / Linux (5.9)	1m 20s
Cxx interop / Cxx interop / Linux (5.10)	1m 13s
Cxx interop / Cxx interop / Windows (nightly-6.0)	1s
Cxx interop / Cxx interop / Windows (6.0)	1s
Cxx interop / Cxx interop / Linux (6.0)	1m 20s
Unit tests / Unit tests / Linux (5.9)	3m 1s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 36s
Unit tests / Unit tests / Linux (5.10)	3m 3s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 40s
Unit tests / Unit tests / Linux (6.0)	1m 14s
Unit tests / Unit tests / Windows (6.0)	3s
Cxx interop / Cxx interop / Windows (nightly-main)	1s
Unit tests / Unit tests / Linux (nightly-6.0)	3m 9s
Unit tests / Unit tests / Linux (nightly-main)	3m 3s
Unit tests / Unit tests / Windows (nightly-6.0)	2s
Unit tests / Unit tests / Windows (nightly-main)	2s
	24m 42s

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