Lint

Build pthreadpool with hidden visibility on Apple #54738

Job	Run time
Get changed files / get-changed-files	5s
android-java-format / linux-job	4m 46s
link-check / lint-xrefs / linux-job	4m 39s
link-check / lint-urls / linux-job	4m 40s
link-check / lint-file-size / linux-job	4m 30s
lintrunner / linux-job	4m 25s
lintrunner-mypy	0s
	23m 5s

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