fix regex in plugins/terminal/iosxr.py (#54817)

Fixes situations where iosxr terminals that do not contain new line "/r/n" at the beginning of CLI timeouts due to regex error. Just make "/r/n" optional including "*" character in the regex

lib/ansible/plugins/terminal/iosxr.py

@@ -29,7 +29,7 @@ from ansible.errors import AnsibleConnectionFailure
 class TerminalModule(TerminalBase):
 
     terminal_stdout_re = [
-        re.compile(br"[\r\n][\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(br"[\r\n]*[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
         re.compile(br']]>]]>[\r\n]?')
     ]