Improve the documentation of profiling with "perf maps"

The documentation lives here: https://github.com/python/cpython/blob/d6cf05b5d00abbfdf9008d646c14c6ef7c83b61a/Doc/howto/perf_profiling.rst

Before #136461, cpython only had support for Linux perf profiling. But with this PR it now supports both Linux and macOS through samply. I updated the documentation to include this, but it's not super great currently because previously it was written with the assumption that it was only supported by Linux perf. So it would be good to restructure this doc in a better way, and add more information related to macOS profiling using samply.

Also samply supports both perf modes so it would be good to clarify when to use them.

cc @pablogsal @hugovk

从 Doc/howto/perf_profiling.rst 开始，并查看 PR #136461 中的更改，以了解当前 Linux perf 和 macOS samply 的支持范围。比较 samply 支持的 perf 模式，并重新组织指南，使平台支持、设置和模式选择清晰明了。完成标准是文档准确说明如何在 Linux 和 macOS 上进行 profiling，以及何时使用每种模式。