85370 Audit hashCode overrides outside of packages/flutter (a: tests, team, tool, framework, f: material design, a: accessibility, cla: yes, waiting for tree to go green)

85451 Revert “Audit hashCode overrides outside of packages/flutter” (a: tests, team, tool, framework, f: material design, a: accessibility, cla: yes)

85484 Eliminate some regressions introduced by the new lookup code (a: tests, framework, f: material design, a: accessibility, cla: yes, f: cupertino, d: api docs, waiting for tree to go green, documentation)

85567 Reland “Audit hashCode overrides outside of packages/flutter”” (a: tests, team, tool, framework, f: material design, a: accessibility, cla: yes)