[several components] replace "withStyles" with "useStyles" in internal component implementations

[croraf]

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Summary 💡

One of the main reasons React introduced hooks was to remove the long component tree chains in react-devtools, arising when HOCs are used.

MUI uses withStyles internally which gives rise to much longer component tree chains in react-devtools. I suggest to switch to the equivalent useStyles syntax in internal implementations.

Check: https://codesandbox.io/s/hoc-hook-comparisson-mui-h6oq9

Specific example of Button MUI component has:

Instead of much simpler:

[oliviertassinari]

Related to #15023. The effort was paused for #6115.