Invalidate the layer when borderCurve changes on iOS

[tshmieldev]

Summary:

On iOS, RCTViewComponentView updateProps:oldProps: only invalidates the layer when borderStyles, borderRadii or borderColors change. A change to borderCurve alone is parsed into borderCurves but never reaches layer.cornerCurve, so the old curve stays on screen until some other border prop changes. This adds borderCurves to that comparison.

Changelog:

[IOS] [FIXED] - Apply borderCurve changes that are not accompanied by another border prop change

Test Plan:

On the iOS simulator (0.88.0-rc.4 with React Native built from source), a plain View with borderRadius: 80 and backgroundColor: 'blue', layered over a static borderCurve: 'circular' box, toggles borderCurve between circular and continuous with setState every 1.5s. Before the change the shape never changes, after it the continuous frames show the circular box outlining the corners.

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