Describe the bug
When using a RectAnnotation with groupId and a chartRotation of 90 or -90, where only the x dimensions are specified, creates an incorrect annotation. The annotation attempts to fallback to the height rather than the width in this given case. Given a rotation of 0 or 180 the height default is expected.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://codesandbox.io/s/gracious-taussig-vetcd?file=/src/App.tsx
2. Resize the rendered chart
3. Notice the width of the chart maintains the height of the chart and not the width.

Expected behaviour
Annotation should default to full width when not specified

Screenshots

Version (please complete the following information):

• Browser: chrome
• Elastic Charts: latest