Fix attach stream closing issues

Fixes: #9860
Fixes: detach and attach tty mode

We never actually need to close container `stdin` after `stdout/stderr` finishes. We only need to close the `stdin` goroutine. In some cases this also means closing `stdin` but that is already controlled by the goroutine itself.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>