[EuiRange] Bug when `showTicks` is `false`

I found this bug in https://github.com/elastic/eui/pull/6447. In `EuiRange` when `showTicks` is set to `false` the track position is out of place.


<img width="450" alt="Screenshot 2023-02-06 at 14 44 34" src="https://user-images.githubusercontent.com/2750668/217003264-18626aa1-911d-4690-b8f8-2c457cb3e293.png">

CodeSandbox: https://codesandbox.io/s/szryhf?file=/demo.tsx
