Add a test ensuring streamed response will error if `EOF` is received early (#1906)

* add: test ensuring streamed response will error if eof is received early
formatting: sort s3 integration test cargo toml deps
update: CHANGELOG.next.toml

* formatting: run cargo fmt
remove: commented out logging init
add: comment for CRLF check
update: read Ok(0) case to say note that it's unreachable and why that's the case
update: debug messages

* update: test to use OS-assigned port instead of 3000