[CI] Enable Windows unit tests #109

Job	Run time
Unit tests / Construct unit test matrix	4s
Integration test / Windows (6.0)	1s
Integration test / Linux (5.9)	1m 42s
Integration test / Linux (5.10)	1m 36s
Integration test / Windows (nightly-6.1)	2s
Soundness / API breakage check	53s
Integration test / Linux (6.0)	1m 52s
Integration test / Windows (nightly-main)	1s
Integration test / Linux (nightly-6.1)	2m 13s
Integration test / Linux (nightly-main)	30s
Soundness / Broken symlinks check	4s
Soundness / Documentation check	1m 4s
Soundness / Format check	37s
Soundness / Python lint check	4s
Soundness / Shell check	34s
Soundness / License headers check	4s
Soundness / Unacceptable language check	2s
Soundness / YAML lint check	3s
Unit tests / Unit tests / Linux (5.9)	40s
Unit tests / Unit tests / Linux (5.10)	47s
Unit tests / Unit tests / Linux (6.0)	51s
Unit tests / Unit tests / Linux (nightly-6.1)	1m 3s
Unit tests / Unit tests / Linux (nightly-main)	54s
Unit tests / Unit tests / Windows (6.0)	12m 39s
Unit tests / Unit tests / Windows (nightly-6.1)	8m 57s
Unit tests / Unit tests / Windows (nightly-main)	10m 31s
	47m 48s

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