Stop using deprecated buildbot.status.builder in steps.py to import variables like SUCCESS, FAILURE, WARNINGS. We should instead use buildbot.process.results
Latest buildbot emits following warning about it while running unit-tests:
/Library/Python/3.7/site-packages/buildbot/status/builder.py:49: DeprecatedApiWarning: [0.9.0 and later] buildbot.status.builder has been deprecated, consume the buildbot.data APIs
Created attachment 421433 [details]
This is similar to https://github.com/WebKit/WebKit/blob/main/Tools/CISupport/ews-build/steps.py#L25
Committed r273557: <https://commits.webkit.org/r273557>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 421433 [details].