25616 migrate tests to nullsafe (cla: yes, platform-web)

25619 [flutter_releases] Flutter Stable 2.0.5 Engine Cherrypicks (platform-android, cla: yes, platform-web, platform-windows, platform-fuchsia)

25620 migrate tests to nullsafe (cla: yes, platform-web)

25659 Include paragraph height in the top-level text style. (cla: yes, platform-web)

25700 Wire up paragraph font weight and font style in canvas golden test (cla: yes, platform-web)

25729 Add web ImageShader support for drawVertices. (cla: yes, platform-web)

25732 Roll CanvasKit to 0.26.0 (cla: yes, platform-web)