"FileListing" can not handle "T" permission

[wushiqinlou]

"file_permissions" encounters "ValueError" when trying to parse the following ls output:

d-w----r-T   2 root   root         6 Jul 24  2022 spooler
drwxrwxrwt     7 0 0  2397 Mar 18 22:39 keyframes

It seems that the function expects "rwxsS" on the "T" location.

Updating the pattern as the following can avoid this issue:

        (.)([-rwxsStT]{3})([-rwxsStT]{3})([-rwxsStT]{3})   # -rwxrwxrwx

https://github.com/RedHatInsights/insights-core/blob/master/insights/util/file_permissions.py