Integration tests for the build plugin #78

Job	Run time
Soundness / Check generated code	1m 15s
Plugin tests / Prepare matrices	3s
Soundness / Swift license headers check	2s
Cxx interop / Construct Cxx interop matrix	2s
Unit tests / Construct unit test matrix	3s
Soundness / API breakage check	28s
Soundness / Broken symlinks check	2s
Soundness / Documentation check	28s
Soundness / Format check	28s
Soundness / License headers check	2s
Soundness / Python lint check	5s
Soundness / Shell check	26s
Soundness / Unacceptable language check	2s
Soundness / YAML lint check	2s
Plugin tests / Execute matrix / Linux (Plugin tests (6.0))	32s
Plugin tests / Execute matrix / Linux (Plugin tests (nightly-6.1))	30s
Plugin tests / Execute matrix / Linux (Plugin tests (nightly-main))	32s
Unit tests / Unit tests / Linux (6.0)	42s
Unit tests / Unit tests / Linux (nightly-6.1)	30s
Unit tests / Unit tests / Linux (nightly-main)	32s
Cxx interop / Cxx interop / Linux (6.0)	28s
Cxx interop / Cxx interop / Linux (nightly-6.1)	41s
Cxx interop / Cxx interop / Linux (nightly-main)	31s
	8m 26s

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