Enable release mode builds #42

Job	Run time
Cxx interop / Construct Cxx interop matrix	6s
Unit tests / Construct unit test matrix	4s
Benchmarks / Construct Benchmarks matrix	4s
Release builds / Construct release build matrix	4s
Soundness / Format check	37s
Soundness / Documentation check	1m 2s
Soundness / API breakage check	49s
Soundness / Unacceptable language check	6s
Soundness / License headers check	4s
Soundness / Shell check	40s
Soundness / Broken symlinks check	7s
Soundness / YAML lint check	3s
Soundness / Python lint check	11s
Unit tests / Unit tests / Linux (nightly-next)	53s
Unit tests / Unit tests / Linux (5.10)	35s
Unit tests / Unit tests / Linux (6.1)	42s
Unit tests / Unit tests / Linux (6.0)	43s
Unit tests / Unit tests / Linux (nightly-main)	56s
Release builds / Release builds / Linux (6.0)	38s
Release builds / Release builds / Linux (6.1)	36s
Release builds / Release builds / Linux (nightly-main)	41s
Release builds / Release builds / Linux (nightly-next)	50s
Release builds / Release builds / Linux (5.10)	30s
Benchmarks / Benchmarks / Linux (5.10)	2m 3s
Benchmarks / Benchmarks / Linux (6.1)	1m 50s
Benchmarks / Benchmarks / Linux (nightly-next)	2m 28s
Benchmarks / Benchmarks / Linux (nightly-main)	2m 18s
Benchmarks / Benchmarks / Linux (6.0)	2m 26s
Cxx interop / Cxx interop / Linux (5.10)	40s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 10s
Cxx interop / Cxx interop / Linux (6.1)	49s
Cxx interop / Cxx interop / Linux (6.0)	44s
Cxx interop / Cxx interop / Linux (nightly-next)	1m 7s
	26m 36s

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