Phabricator/2023 Phorge test plan

Areas of code to test on.


 * ✅ Diffusion code browsing: Broken but expected, e.g. http://127.0.0.1:8080/source/mediawiki/history/
 * [Not possible?] Authentication
 * Legalpad
 * [Not possible?] Conduit: Test API with some Legalpad call?
 * [Not possible] Conduit: https://phab-ban.toolforge.org/ integration
 * Tasks: Security task privacy
 * ✅ Tasks: "Protect as Security issue" function in task sidebar - http://127.0.0.1:8080/T333885#9018349
 * Project workboard customizations, e.g. reordering milestones
 * ✅ Custom project reports - http://127.0.0.1:8080/project/reports/33/ - no new regressions apart from known bugs
 * ✅ Project default reports (burndown etc) - http://127.0.0.1:8080/maniphest/report/burn/?project=PHID-PROJ-2olj6ckxwlzq3akoznah ; http://127.0.0.1:8080/maniphest/report/project/ ; http://127.0.0.1:8080/maniphest/report/user/
 * [Not a regression; investigate later] Project burnup graph requires login
 * [Not a regression; investigate later] Project Reports: Item in project sidebar not shown when logged out; Burndown and Activity graphs do not render when logged out
 * ✅ Calendar: Create event - http://127.0.0.1:8080/E1664
 * Homepage: check if the Dashboard Panels with Tabs are opened by default (659e13fa6d0e)