ci: make sure to kill gpg related processes (#8549)
ci: make sure to kill gpg related processes (#8549)

Removing the directory while gpg-agent and dirmngr are running is not always possible, causing random errors during CI runs.
sticilface/Arduino,sticilface/Arduino,sticilface/Arduino,esp8266/Arduino,sticilface/Arduino,esp8266/Arduino,sticilface/Arduino,esp8266/Arduino,esp8266/Arduino,esp8266/Arduino