Fix metadata check in interop tests #85

Job	Run time
Cxx interop / Construct Cxx interop matrix	4s
Soundness / Check generated code	1m 53s
Soundness / Swift license headers check	3s
Unit tests / Construct unit test matrix	2s
Soundness / Documentation check	2m 0s
Soundness / Broken symlinks check	3s
Soundness / API breakage check	1m 55s
Soundness / Format check	37s
Soundness / License headers check	5s
Soundness / Python lint check	6s
Soundness / Shell check	35s
Soundness / Unacceptable language check	3s
Soundness / YAML lint check	5s
Unit tests / Unit tests / Linux (6.0)	1m 36s
Unit tests / Unit tests / Linux (nightly-6.1)	1m 42s
Unit tests / Unit tests / Linux (nightly-main)	1m 36s
Cxx interop / Cxx interop / Linux (6.0)	1m 36s
Cxx interop / Cxx interop / Linux (nightly-6.1)	1m 42s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 46s
	17m 29s

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