ci: Move run-docker-tests to free runner

Removed the Docker installation step as that's preinstalled in free
runners.

Signed-off-by: Aurélien Bombo <abombo@microsoft.com>

tests/integration/docker/gha-run.sh

@@ -17,8 +17,6 @@ image="${image:-instrumentisto/nmap:latest}"
 function install_dependencies() {
 	info "Installing the dependencies needed for running the docker smoke test"
 
-	install_docker
-
 	sudo -E docker pull "${image}"
 }