Describe the bug
The config.width and config.height in the partition chart, at least in the pie chart layout, are overwritten by the parentDimensions.

The first part where the width and height are overwritten is visible in the getShapeViewModel before merging the partial config.

The second place is in the partitionMultiGeometries where we compute the chartWidth and chartHeight as derived from the marginedWidth/Height (always coming from the parentDimensions). On the same function we should also check the innerWidth/Height that also comes from the parentDimensions

To Reproduce
Steps to reproduce the behavior:

1. Go to https://codesandbox.io/s/youthful-curran-egqkv?file=/src/App.tsx
2. Try to use width, height in the config, instead of the currently proposed workaround with margin/outerSizeRatio
3. The size of the pie will be always the size of the parent, no matter what value are used as width/height in the Config

Expected behaviour
We should respect the config.width and config.height parameters exposed by the Partition component. If we don't want that feature, we should remove them from the API.

Version:

• Elastic Charts: 29.2.0

Errors in browser console
N/A