tests: install psql command

required by tests
maybe it was already installed on github actions by default? we can't
rely on it, better do it explicitly
then it also works on other plattforms, such as act

.github/workflows/scripts/setup-full.sh

@@ -19,6 +19,8 @@ if [ $python_version == '3.8' ]; then
 	# for pymssql there are no wheels for 3.8 https://github.com/certtools/intelmq/issues/2539
 	DEBIAN_FRONTEND="noninteractive" sudo -E apt install -y build-essential freetds-dev libssl-dev libkrb5-dev
 fi
+# for psql (used below)
+DEBIAN_FRONTEND="noninteractive" sudo -E apt install -y postgresql-client-14
 
 # Install the dependencies of all the bots
 pip install wheel