Add Scout to the list of available backends #13

Job	Run time
Soundness / License headers check	4s
Soundness / Documentation check	55s
Soundness / API breakage check	41s
Soundness / Unacceptable language check	5s
Soundness / Broken symlinks check	4s
Soundness / Format check	33s
Soundness / Python lint check	6s
Soundness / Shell check	31s
Soundness / YAML lint check	6s
Cxx interop / Cxx interop / Linux (5.9)	38s
Cxx interop / Cxx interop / Linux (5.10)	45s
Cxx interop / Cxx interop / Linux (6.0)	44s
Cxx interop / Cxx interop / Linux (nightly-6.0)	48s
Cxx interop / Cxx interop / Windows (6.0)	2s
Cxx interop / Cxx interop / Linux (nightly-main)	53s
Cxx interop / Cxx interop / Windows (nightly-6.0)	3s
Unit tests / Unit tests / Windows (6.0)	11m 58s
Unit tests / Unit tests / Linux (5.9)	48s
Unit tests / Unit tests / Windows (nightly-6.0)	9m 45s
Unit tests / Unit tests / Linux (5.10)	42s
Cxx interop / Cxx interop / Windows (nightly-main)	2s
Unit tests / Unit tests / Windows (nightly-main)	13m 29s
Unit tests / Unit tests / Linux (6.0)	47s
Unit tests / Unit tests / Linux (nightly-6.0)	53s
Unit tests / Unit tests / Linux (nightly-main)	52s
	46m 14s

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