[27.1 backport] fix: container stream should not be terminated by ctx

[Benehiko]

• backports: fix: container stream should not be terminated by ctx #5247
• fixes: SIGTERM sent to docker run command doesn't send a SIGTERM to the main process running inside the container anymore. #5241

- What I did
Prevent the hijacked stream from exiting on main ctx cancellation. When the user sends a termination signal to the CLI while attached to a container, the signal should be forwarded to the container and handled by the process inside the container. The CLI should wait for the container to gracefully exit.

If the user wishes to exit without waiting, sending more termination requests will still forcefully exit the CLI.

- How I did it

- How to verify it

handle_sigterm.sh

#!/bin/sh# Function to handle SIGTERMhandle_sigterm() {
echo"Received SIGTERM, exiting..."exit 0
}
trap'handle_sigterm' TERM
whiletrue;doecho"Waiting for sigterm"
sleep 10
done

⋊> ~/G/cli on hotfix-sigterm-container ◦ build/docker run -i \  -v $HOME/Downloads/:/home:ro \ alpine:latest \ /home/handle_sigterm.shWaiting for sigtermWaiting for sigtermReceived SIGTERM, exiting...

⋊> ~ ps -ef | grep "handle_sigterm.sh" | grep "docker run"benehiko 279458 277233 1 17:48 pts/5 00:00:00 build/docker run -i -v /home/benehiko/Downloads/:/home:ro alpine:latest /home/handle_sigterm.sh⋊> ~ kill -15 279458 

- Description for the changelog

sending a termination request to the CLI while attached to a container, will wait for the container to exit before closing the stream.

- A picture of a cute animal (not mandatory but encouraged)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.42%. Comparing base (52848fb) to head (333103d).

Additional details and impacted files

@@ Coverage Diff @@## 27.0 #5250 +/- ##
=======================================
Coverage 61.42% 61.42% =======================================
Files 298 298 Lines 20815 20816 +1 =======================================
+ Hits 12785 12786 +1 + Misses 7117 7114 -3 - Partials 913 916 +3