Send SIGINT instead of SIGQUIT to puma

Puma does not handle SIGQUIT [1], so worker processes will not get
terminated when calling /etc/init.d/gitlab stop

[1] https://github.com/puma/puma/blob/master/docs/signals.md

bin/actioncable

@@ -36,7 +36,7 @@ start_foreground()
 stop()
 {
   get_puma_pid
-  kill -QUIT "$(get_puma_pid)"
+  kill -INT "$(get_puma_pid)"
 }
 
 reload()

bin/web_puma

@@ -36,7 +36,7 @@ start_foreground()
 stop()
 {
   get_puma_pid
-  kill -QUIT "$(get_puma_pid)"
+  kill -INT "$(get_puma_pid)"
 }
 
 reload()

changelogs/unreleased/puma_sigint.yml

+---
+title: Send SIGINT instead of SIGQUIT to puma
+merge_request: 54446
+author: Jörg Behrmann @behrmann
+type: fixed