40367 [Docs] Create ‘center’ snippets template (cla: yes, f: material design, framework, team)

40368 ensure dart2js does not compile unsupported packages (cla: yes, tool)

40370 rename port to web-port and hostname to web-hostname (cla: yes, tool)

40372 Roll engine from 7ea9884..3c6383f (77 commits 🔥) (cla: yes, engine, waiting for tree to go green)

40375 Harden macOS build use of Xcode project getInfo (cla: yes, tool)

40386 Revert “Roll engine from 7ea9884..3c6383f (77 commits 🔥) (#40372)” (cla: yes, engine)