[WIP] Vector methods are missing inheritdoc docs

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

Describe the issue or suggestion

Some of the APIs in the System.Runtime.Intrinsics namespace are missing XML doc comments, even though they have <inheritdoc /> tags in the source code (example). We should populate the XML files in this folder with the appropriate inherited doc comments from the source code in the dotnet/runtime repo. Don't just insert <inheritdoc /> tags. Instead, to work around this issue, follow the inherit doc chain to find the actual documentation (for example, for Vector512.Max, follow the inheritdoc chain all the way up till ISimdVector<TSelf, T>.Max and copy the summary, parameter docs, returns, and exception docs from there).

Fixes #11494.

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