Ignore NTP leap second file expired syslog (sonic-net#16347)

What is the motivation for this PR?
Recently testcase fails with the syslog error:
2024 Dec 30 15:13:59.746932 str3-7260cx3-acs-14 ERR ntpd[64974]: CLOCK: leapsecond file ('/usr/share/zoneinfo/leap-seconds.list'): expired less than 3 days ago

How did you do it?
Ignore this syslog error for now.

ansible/roles/test/files/tools/loganalyzer/loganalyzer_common_ignore.txt

@@ -312,6 +312,9 @@ r, ".* ERR sshd\[\d*\]: auth fail.*"
 # ignore NTP nss_tacplus error, which will happen when reload config, because NTPD will invoke getpwnap API but nss_tacplus will re-render during reload config
 r, ".* ERR ntpd\[\d*\]: nss_tacplus: .*"
 
+# ignore leap second file NTP daemon (ntpd) is using has passed its expiration date
+r, ".* ERR ntpd\[\d*\]:.*leapsecond file ('/usr/share/zoneinfo/leap-seconds.list'): expired.*"
+
 # Ignore auditd error
 r, ".* ERR auditd\[\d*\]: Error receiving audit netlink packet \(No buffer space available\)"
 r, ".* ERR audisp-tacplus: tac_connect_single: connection failed with.*Interrupted system call"