[core] Use `useRtl` instead of `useTheme` to access direction

[LukasTy]

Follow up on https://github.com/mui/mui-x/pull/13363.

When working on https://github.com/mui/mui-x/pull/14142 and noticing that we are reverting back to @mui/system as a peer dependency I thought that it would make sense for all packages to actually "need" that peer dependency to function properly.

This is also a stepping stone for PigmentCSS support.

It also has the added benefit of further reducing the coupling with @mui/material.

Review from the Data Grid team is essential as it touches the store. I've done some testing to ensure that it functions as it currently does, but at least a second pair of eyes is essential.

[mui-bot]

Deploy preview: https://deploy-preview-14359--material-ui-x.netlify.app/

Generated by :no_entry_sign: dangerJS against 2f41c560891cd4ea6db201eb1360a7a0aa3f4625

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #14359 will not alter performance

_{Comparing LukasTy:use-is-rtl-hook (2f41c56) with master (1a23942)}

Summary

✅ 3 untouched benchmarks

[github-actions[bot]]

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