Auto merge of #136769 - thaliaarchi:io-optional-methods/stdio, r=joboet

Provide optional `Read`/`Write` methods for stdio

Override more of the default methods for `io::Read` and `io::Write` for stdio types, when efficient to do so, and deduplicate unsupported types.

Tracked in rust-lang/rust#136756.

try-job: x86_64-msvc-1

Author: bors