Run docker probe only if docker or podman are available

The docker probe uses "sudo -n" which can cause an e-mail with a security warning
each time when configure is run. Therefore run docker probe only if either docker
or podman are available.

That avoids the problematic "sudo -n" on build environments which have neither
docker nor podman installed.

Fixes: c4575b5 ("configure: store container engine in config-host.mak")
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Message-Id: <20221030083510.310584-1-sw@weilnetz.de>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20221111145529.4020801-2-alex.bennee@linaro.org>

configure

@@ -1780,7 +1780,7 @@ fi
 # functions to probe cross compilers
 
 container="no"
-if test $use_containers = "yes"; then
+if test $use_containers = "yes" && (has "docker" || has "podman"); then
     case $($python "$source_path"/tests/docker/docker.py probe) in
         *docker) container=docker ;;
         podman) container=podman ;;