Allow overriding buildbot hostname to send patches to if it's specified in passwords.json. We might need to specify a different hostname to send patches to while running ews on kube.
Pull request: https://github.com/WebKit/WebKit/pull/6395
Committed 256577@main (c739b1b0fb37): <https://commits.webkit.org/256577@main> Reviewed commits have been landed. Closing PR #6395 and removing active labels.
<rdar://problem/102246353>