Enable MemberImportVisibility check on all targets #7

Job	Run time
Unit tests / Construct unit test matrix	3s
Cxx interop / Construct Cxx interop matrix	3s
Soundness / API breakage check	3m 35s
Soundness / Documentation check	2m 32s
Soundness / Broken symlinks check	2s
Soundness / Format check	45s
Soundness / License headers check	3s
Soundness / Shell check	43s
Soundness / Unacceptable language check	3s
Soundness / Python lint check	4s
Soundness / YAML lint check	2s
Unit tests / Unit tests / Linux (5.9)	1m 58s
Unit tests / Unit tests / Linux (5.10)	1m 57s
Unit tests / Unit tests / Linux (6.0)	2m 17s
Unit tests / Unit tests / Linux (nightly-6.0)	2m 49s
Unit tests / Unit tests / Linux (nightly-main)	1m 30s
Cxx interop / Cxx interop / Linux (5.9)	2m 8s
Cxx interop / Cxx interop / Linux (5.10)	2m 1s
Cxx interop / Cxx interop / Linux (6.0)	2m 21s
Cxx interop / Cxx interop / Linux (nightly-6.0)	2m 56s
Cxx interop / Cxx interop / Linux (nightly-main)	2m 56s
	30m 48s

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