Damcava35/deb12 scripts 3 (#279)

* add "apt_remove" in lib/utils.sh

in order to manage DEBIAN_FRONTEND

* feat: add new scripts for debian 12

- tftp_is_disabled              ->      2.1.16
- network_services_listening    ->      2.1.22
- use_time_sync                 ->      2.3.1.1
Update the existing script to check there is only one installed

- chrony_is_enabled_and_running ->      2.3.3.3

---------

Co-authored-by: damien cavagnini <damien.cavagnini@corp.ovh.com>

tests/hardening/chrony_is_enabled_and_running.sh

@@ -0,0 +1,19 @@
+# shellcheck shell=bash
+# run-shellcheck
+test_audit() {
+
+    describe Ensure package is installed
+
+    # install dependencies
+    apt update
+    apt install -y chrony
+
+    # not much to test here, we are running in a container, we wont check service state
+    describe Checking blank host
+    register_test retvalshouldbe 0
+    # shellcheck disable=2154
+    run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
+
+    apt remove -y chrony
+
+}