[EUI+] [EuiDataGrid] Fix issues with the component docs

[weronikaolejniczak]

The purpose of this task is to fix the issues in the EuiDataGrid component documentation in the EUI+.

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Issues:

• Move each individual section to a sub-page of the main Data Grid page example.
• Sections in the left sidebar are out of order compared to prod (e.g. advanced section should be at the bottom). They’re ordered the way they are for a reason, which is most common/needed use cases to least, and it’s going to be more intuitive for devs to follow the existing order.
• Top level props section: just linking to the props table isn’t really the same and misses out on links + code snippet examples.
• Check production for any missing upgrades.
• EuiDataGrid toolbar props table appears to be broken due to an issue with mdx syntax.
• EuiDataGrid auto row height examples are all broken/erroring with “require is not defined”.