OnHover/Enter/Exit is not Triggered

When you connect to `onHover, onHoverEntered` signals for the PieSeries, they never get fired even when the series property `hoverable: true`.

This seems like partially working with Qt6.9.0  but the value provided by the signal seems to be incorrect. It does not contain the value of the PieSlice or even the percentage of the Pie for that PieSlice, it returns the exact position in degrees as a double for y and x is the first position in degrees that the pie slice starts at.

Attached example which can be used to reproduce the issue.

Expectation is that it should be fixed with LTS Qt6.8.x