[Slider] Thumb shifts to the right upon clicking

[danilo-leal]

Search keywords: slider, base-ui, thumb

As surfaced in https://github.com/mui/material-ui/pull/40332, when you click on the Slider's thumb, there's a slight shift to the right, making it stay misaligned in relation to the tip of the cursor.

[mj12albert]

In https://github.com/mui/base-ui/pull/373 I've fixed it so that clicks that land on the thumb will not change the value or shift the thumb: https://deploy-preview-373--base-ui.netlify.app/experiments/slider/