91516 Migrate crash_reporting and github_template (tool, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)

91518 Roll Engine from af34f7b267fe to 597516c2fe80 (1 revision) (cla: yes, waiting for tree to go green)

91522 Roll Engine from 597516c2fe80 to 2d8b3571d074 (3 revisions) (cla: yes, waiting for tree to go green)

91527 Document why some lints aren’t enabled and fix some minor issues. (a: tests, team, tool, framework, cla: yes, waiting for tree to go green)