45211 Revert “Attach looks at future observatory URIs” (cla: yes, tool)

45212 Upgrade gauge for debugging (cla: yes, team, team: infra)

45215 Remove  URLs in deprecation annotation (cla: yes, team)

45217 Roll engine c812a62b8810..2d35b4ec1f04 (4 commits) (cla: yes, engine)

45228 Reland: Attach looks at future observatory URIs (cla: yes, tool)

45236 Improve time to development by initializing frontend_server concurrently with platform build (cla: yes, tool)

45237 Revert “Attach looks at future observatory URIs” (cla: yes, tool)