API tests can generate warnings, but we generally want to ignore these and treat a 'WARNING' status as 'SUCCESS'.
<rdar://problem/104039066>
Pull request: https://github.com/WebKit/WebKit/pull/8408
For reference, example of a build having problem: https://ews-build.webkit.org/#/builders/3/builds/92999. `run-api-tests` completed with warning status, but whole test suite was retried.
Committed 258683@main (e9bc660d476d): <https://commits.webkit.org/258683@main> Reviewed commits have been landed. Closing PR #8408 and removing active labels.