Enable warnings as errors in CI #142

Job	Run time
Unit tests / Construct unit test matrix	4s
Cxx interop / Construct Cxx interop matrix	3s
Soundness / API breakage check	4m 28s
Soundness / Broken symlinks check	3s
Soundness / Documentation check	2m 58s
Soundness / Format check	39s
Soundness / License headers check	3s
Soundness / Shell check	32s
Soundness / Unacceptable language check	5s
Soundness / YAML lint check	3s
Soundness / Python lint check	5s
Static SDK / Static SDK / Linux (latest-release Jammy)	3m 42s
Static SDK / Static SDK / Linux (main Jammy)	1m 55s
Cxx interop / Cxx interop / Linux (5.10)	2m 40s
Cxx interop / Cxx interop / Linux (6.0)	2m 56s
Cxx interop / Cxx interop / Linux (6.1)	2m 54s
Cxx interop / Cxx interop / Linux (nightly-next)	3m 34s
Cxx interop / Cxx interop / Linux (nightly-main)	3m 47s
Unit tests / Unit tests / Linux (5.10)	4m 58s
Unit tests / Unit tests / Linux (6.0)	5m 15s
Unit tests / Unit tests / Linux (6.1)	4m 57s
Unit tests / Unit tests / Linux (nightly-next)	5m 44s
Unit tests / Unit tests / Linux (nightly-main)	6m 0s
	57m 25s

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