29330 [fuchsia] INTERNAL epitaph for non-zero return codes (cla: yes, platform-fuchsia, needs tests)

29339 Revert “Bump ICU to ece15d049f2d360721716089372e3749fb89e0f4. (#29313)” (cla: yes, platform-fuchsia)

29340 Bump ICU to ece15d049f2d360721716089372e3749fb89e0f4. (#29313) (cla: yes, platform-fuchsia)

29393 [fuchsia] Remove unused sdk_ext.gni. (cla: yes, waiting for tree to go green, platform-fuchsia)