Update setup_ntp_context to detect NTP daemon type (#18583)

Bookworm uses ntpsec as the NTP daemon on the PTF host. The PR is modified to be backward compatible with Bullseye. It detects the NTP daemon type which is NTP on Bullseye and NTPSEC on Bookworm. Fixes test failures on Bookworm that rely on the NTP daemon setup like ip/test_mgmt_ipv6_only.py::test_ntp_ipv6_only

Author: opcoder0

tests/common/helpers/ntp_helper.py

@@ -15,20 +15,29 @@ class NtpDaemon(Enum):
 @contextmanager
 def setup_ntp_context(ptfhost, duthost, ptf_use_ipv6):
     """setup ntp client and server"""
-    ptfhost.lineinfile(path="/etc/ntp.conf", line="server 127.127.1.0 prefer")
+    ntp_daemon_type = get_ntp_daemon_in_use(ptfhost)
+    ntp_conf_path = None
+    if ntp_daemon_type == NtpDaemon.NTPSEC:
+        ntp_conf_path = '/etc/ntpsec/ntp.conf'
+    elif ntp_daemon_type == NtpDaemon.CHRONY:
+        ntp_conf_path = '/etc/chrony/chrony.conf'
+    elif ntp_daemon_type == NtpDaemon.NTP:
+        ntp_conf_path = '/etc/ntp.conf'
+
+    ptfhost.lineinfile(path=ntp_conf_path, line="server 127.127.1.0 prefer")
 
     # restart ntp server
     ntp_en_res = ptfhost.service(name="ntp", state="restarted")
 
-    pytest_assert(wait_until(120, 5, 0, check_ntp_status, ptfhost, NtpDaemon.NTP),
+    pytest_assert(wait_until(120, 5, 0, check_ntp_status, ptfhost, ntp_daemon_type),
                   "NTP server was not started in PTF container {}; NTP service start result {}"
                   .format(ptfhost.hostname, ntp_en_res))
 
     # When using Chrony as the NTP daemon on the DUT, Chrony will not use NTP sources that have a
     # root dispersion of more than 3 seconds (configurable via /etc/chrony/chrony.conf, but we currently
     # don't touch that setting). Therefore, block here until the root dispersion is less than 3 seconds
     # so that we don't incorrectly fail the test.
-    pytest_assert(wait_until(180, 10, 0, check_max_root_dispersion, ptfhost, 3, NtpDaemon.NTP),
+    pytest_assert(wait_until(180, 10, 0, check_max_root_dispersion, ptfhost, 3, ntp_daemon_type),
                   "NTP timing hasn't converged enough in PTF container {}".format(ptfhost.hostname))
 
     # check to see if iburst option is present