Confined sysadm users cannot execute `sosreport` command after sudo'ing, a backtrace is printed and AVCs are seen

Issue

• When a user is confined to sysadm_u SELinux user and tries to execute sudo sosreport, AVCs are seen and later the sosreport command aborts

  Permission denied while finalizing archive /var/tmp/sos.kydrcitq/sosreport-xxx
  
  Creating archive tarball failed.
  Traceback (most recent call last):
    File "/sbin/sosreport", line 33, in <module>
      sos.execute()
    File "/usr/lib/python3.6/site-packages/sos/__init__.py", line 185, in execute
      self._component.execute()
    File "/usr/lib/python3.6/site-packages/sos/report/__init__.py", line 1350, in execute
      return self.final_work()
    File "/usr/lib/python3.6/site-packages/sos/report/__init__.py", line 1263, in final_work
      archivestat, map_file=map_file)
  UnboundLocalError: local variable 'archivestat' referenced before assignment