Revert "[scripts/fast-reboot] Shutdown remaining containers through systemd (#2133)" (#2161)

This reverts commit 23e9398.

- What I did
Revert "[scripts/fast-reboot] Shutdown remaining containers through systemd (#2133)"

This reverted PR is part of a story that refactors warm/fast shutdown sequence to gracefully stop services instead of killing them without any ordering and dependency requirements which creates several issues and is error prone for the future.

This PR must come together with sonic-net/sonic-buildimage#10510.
However, #10510 is blocked due to an issue in swss-common sonic-net/sonic-swss-common#603
And a fix by MSFT is in review sonic-net/sonic-swss-common#606

I am reverting it because its dependency is still blocked and we cannot update submodule pointer. Once the dependency of the reverted PR is resolved, it shall be re-committed.

Author: malletvapid23

scripts/fast-reboot

@@ -738,6 +738,26 @@ for service in ${SERVICES_TO_STOP}; do
     fi
 done
 
+# Kill other containers to make the reboot faster
+# We call `docker kill ...` to ensure the container stops as quickly as possible,
+# then immediately call `systemctl stop ...` to prevent the service from
+# restarting the container automatically.
+debug "Stopping all remaining containers ..."
+if test -f /usr/local/bin/ctrmgr_tools.py
+then
+    /usr/local/bin/ctrmgr_tools.py kill-all
+else
+    for CONTAINER_NAME in $(docker ps --format '{{.Names}}'); do
+        CONTAINER_STOP_RC=0
+        docker kill $CONTAINER_NAME &> /dev/null || CONTAINER_STOP_RC=$?
+        systemctl stop $CONTAINER_NAME || debug "Ignore stopping $CONTAINER_NAME error $?"
+        if [[ CONTAINER_STOP_RC -ne 0 ]]; then
+            debug "Failed killing container $CONTAINER_NAME RC $CONTAINER_STOP_RC ."
+        fi
+    done
+fi
+debug "Stopped all remaining containers ..."
+
 # Stop the docker container engine. Otherwise we will have a broken docker storage
 systemctl stop docker.service || debug "Ignore stopping docker service error $?"