71859 Update integration_test README for iOS (cla: yes, documentation, waiting for tree to go green)

71860 Do not add CI build settings to macOS (cla: yes, team, tool)

71861 Remove isMaterialAppTheme property (cla: yes, f: material design, framework, waiting for tree to go green)

71862 Remove manual Flutter linking for iOS projects (cla: yes, platform-ios, t: xcode, tool)

71866 Mark hot_mode_dev_cycle_macos_target__benchmark not flaky (cla: yes, team, waiting for tree to go green)

71868 Doc fixes for dry layout (cla: yes, framework)