[Slider] Slider having marks should be customizable in theme

[ZeeshanTamboli]

• I have followed (at least) the PR section of the contributing guide.

Fixes #32789

Slider's ownerState does not have marksProp property which is used to calculate marked but anyway marked is already calculated in the useSlider hook which is then later added in the ownerState.

Before: https://codesandbox.io/s/small-platform-us0i9x?file=/src/Demo.tsx
Now: https://codesandbox.io/s/winter-surf-gxrp6z?file=/src/Demo.tsx

[mui-bot]

Details of bundle changes

Generated by 🚫 dangerJS against 0ecef76

[mnajdova]

Nice catch! One could argue that the change in SliderUnstyled is a breaking change as it is used in the Slider too, but I would say it is a fix indeed 👍