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

Comece com Doc/howto/perf_profiling.rst e revise as alterações de PR #136461 para entender a cobertura atual de Linux perf e macOS samply. Compare os modos de perf compatíveis com samply e reorganize o guia para que o suporte às plataformas, a configuração e a seleção do modo sejam claros. O trabalho estará concluído quando a documentação explicar com precisão como fazer profiling no Linux e no macOS e quando usar cada modo.