Fix the shared memory cleaning script (#4369) (#4425)

Fix the invalid regular expression that leads to skipping the processing of shared lock files.

Signed-off-by: Artem Shumov <agshumov@sberautotech.ru>
(cherry picked from commit 8c3e3b3)

Co-authored-by: Artem Shumov <agshumov@sberautotech.ru>

tools/fastdds/shm/clean.py

@@ -91,7 +91,7 @@ def __clean_zombie_segments(self):
             The deleted file names
 
         """
-        segment_lock_re = re.compile('^fastrtps_(\\d|[a-z]){16}_el|_sl')
+        segment_lock_re = re.compile('^fastrtps_(\\d|[a-z]){16}(_el|_sl)')
 
         # Each segment has an "_el" lock file that is locked if the segment
         # is open and the owner process is alive
@@ -123,7 +123,7 @@ def __clean_zombie_ports(self):
             the deleted file names
 
         """
-        port_lock_re = re.compile('^fastrtps_port\\d{,5}_el|_sl')
+        port_lock_re = re.compile('^fastrtps_port\\d{,5}(_el|_sl)')
         # Each port has an "_el | _sl" lock file that is locked if the port
         # is open and the owner process is alive
         port_locks = [