27238 Remove sky_services, flutter_services (cla: yes, needs tests)

27239 Roll Skia from bc26cfc9a54a to 744c6a1b1992 (1 revision) (cla: yes, waiting for tree to go green)

27240 pub get offline for scenario_app (cla: yes, waiting for tree to go green)

27241 Migrate non-scenic-based fuchsia tests to cfv2. (affects: tests, cla: yes, platform-fuchsia, tech-debt)

27242 Roll Skia from 744c6a1b1992 to d471e7c36dd4 (4 revisions) (cla: yes, waiting for tree to go green)