feat: Run shadow and color CSS transitions on Core Animation

[MatiPl01]

Summary

Stacked on #9655.

Adds shadowOpacity, shadowRadius, shadowOffset, shadowColor, backgroundColor and borderColor to the set of CSS transition properties that run on Core Animation (behind IOS_CSS_CORE_ANIMATION).

Shadow properties always live on the view's main layer. Background and border colors route only while RN uses Core Animation border rendering for the view (mirrored useCoreAnimationBorderRendering condition) - otherwise RN draws them into sublayers that are rebuilt on every commit, so such views keep using the loop.

Test plan

• -fsyntax-only compile check, clang-format clean
• Needs device verification with the IOS_CSS_CORE_ANIMATION flag enabled

[MatiPl01]

Superseded by the newer per-property stack on top of the merged #9654: shadow props now route via #9685, and backgroundColor/borderColor via #9689. The Core-Animation-border-rendering eligibility condition from this PR will be reintroduced in a dedicated eligibility follow-up, so it is not lost. Closing in favor of #9685 and #9689.