MXKRoomBubbleCellData: Remove `componentIndexOfEvent:` and use `bubbleComponentIndexForEventId:` internally.
MXKRoomBubbleCellData: Remove `componentIndexOfEvent:` and use `bubbleComponentIndexForEventId:` internally.

matrix-org/matrix-ios-kit,matrix-org/matrix-ios-kit,matrix-org/matrix-ios-kit,matrix-org/matrix-ios-kit