Limit number of emails to send for flaky and pre-existing API and layout test failures. This is to ensure if a ews run fails with thousands of flaky or pre-existing failures, we don't send thousands of emails to bot watchers. Similar to Bug 216857.
Created attachment 409469 [details] Patch
Committed r267493: <https://trac.webkit.org/changeset/267493> All reviewed patches have been landed. Closing bug and clearing flags on attachment 409469 [details].
<rdar://problem/69450615>