For quantitative values, the directionality for `yOffset` is reversed compared to `y`

[joelostblom]

The x encoding direction along the axis/domain is left to right for both categorical and quantitative values. The y-axis direction is top to bottom for categorical values, the direction is bottom to top for quantitative values:

Expected	Expected

Confusingly, while the xOffset encoding mimics the behavior of the regular x encoding, the yOffset encoding does not follow the behavior of the y encoding. Instead, the yOffset direction is top to bottom for both categorical and quantitative values:

Expected	NOT expected

The expected behavior with and quantitative yOffset would be to match that of a quantitative y encoding, i.e. a bottom to top directionality:

Open the Chart in the Vega Editor (will work as intended after PR #9817)