Allow wdmd list the contents of the sysfs directories

[zpytela]

The commit addresses the following AVC denial: type=PROCTITLE msg=audit(02/23/2024 23:59:13.212:1911) : proctitle=/usr/sbin/wdmd --probe type=PATH msg=audit(02/23/2024 23:59:13.212:1911) : item=0 name=/sys/class/watchdog/watchdog0/identity nametype=UNKNOWN cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 type=CWD msg=audit(02/23/2024 23:59:13.212:1911) : cwd=/ type=SYSCALL msg=audit(02/23/2024 23:59:13.212:1911) : arch=x86_64 syscall=openat success=no exit=EACCES(Permission denied) a0=AT_FDCWD a1=0x7ffce5f5ed10 a2=O_RDONLY a3=0x0 items=1 ppid=182355 pid=182356 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=wdmd exe=/usr/sbin/wdmd subj=system_u:system_r:wdmd_t:s0 key=(null) type=AVC msg=audit(02/23/2024 23:59:13.212:1911) : avc: denied { read } for pid=182356 comm=wdmd name=watchdog0 dev="sysfs" ino=22335 scontext=system_u:system_r:wdmd_t:s0 tcontext=system_u:object_r:sysfs_t:s0 tclass=lnk_file permissive=0

Resolves: RHEL-26663