bpo-46487: Add `get_write_buffer_limits` to Write and _SSLProtocol transports (GH-30958)


Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
(cherry picked from commit 64568acbd88a88d54ac9b8215447f88280448dd5)

Co-authored-by: Emiya <importz750@gmail.com>
3 files changed