Port System.IO new docs (second pass)

[carlossanlop]

Some APIs were missed in the previous PR.

Contributes to dotnet/runtime#105979

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-io

[jozkee]

@adegeo @dotnet/docs for overloads using the new params ReadOnlySpan<T> language feature, they should render as params, not as scoped I believe:

cc @stephentoub

[carlossanlop]

@adegeo @dotnet/docs for overloads using the new params ReadOnlySpan<T> language feature, they should render as params, not as scoped I believe:

I opened a bug for the Docs Dev Team: https://dev.azure.com/ceapex/Engineering/_workitems/edit/989732

cc @gewarren

[carlossanlop]

The NFloat failure is unrelated to this PR, I'm fixing it here: #10211 (comment)

[learn-build-service-prod]

Learn Build status updates of commit d6aa03a:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.IO/File.xml	✅Succeeded	View
xml/System.IO/Path.xml	✅Succeeded	View
xml/System.IO/StreamWriter.xml	✅Succeeded	View
xml/System.IO/TextWriter.xml	✅Succeeded	View

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