Allow collectd read udev pid files

The commit addresses the following AVC denial:
type=PROCTITLE msg=audit(11/13/2023 11:36:52.646:207) : proctitle=/usr/sbin/collectd
type=PATH msg=audit(11/13/2023 11:36:52.646:207) : item=0 name=/run/udev/data/b259:0 inode=1253 dev=00:1a mode=file,644 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:udev_var_run_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0
type=SYSCALL msg=audit(11/13/2023 11:36:52.646:207) : arch=x86_64 syscall=openat success=no exit=EACCES(Permission denied) a0=AT_FDCWD a1=0x7fd79ce6d850 a2=O_RDONLY|O_CLOEXEC a3=0x0 items=1 ppid=1 pid=1632 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=reader#0 exe=/usr/sbin/collectd subj=system_u:system_r:collectd_t:s0 key=(null)
type=AVC msg=audit(11/13/2023 11:36:52.646:207) : avc:  denied  { read } for  pid=1632 comm=reader#0 name=b259:0 dev="tmpfs" ino=1253 scontext=system_u:system_r:collectd_t:s0 tcontext=system_u:object_r:udev_var_run_t:s0 tclass=file permissive=0

Resolves: rhbz#2249257

policy/modules/contrib/collectd.te

@@ -136,6 +136,10 @@ optional_policy(`
     snmp_read_snmp_var_lib_dirs(collectd_t)
 ')
 
+optional_policy(`
+	udev_read_pid_files(collectd_t)
+')
+
 optional_policy(`
 	virt_read_config(collectd_t)
 	virt_stream_connect(collectd_t)