Export of tar.gz formatted archives has to support POSIX long filename format

Current Situation

Currently when exporting workflows, schedules, etc. in tar.gz format with a path length > 100 bytes a Server Error 500 occurs, with the stacktrace being logged in the jetty.log.

Desired Behavior

When exporting workflows, etc. no error should occur. Paths with > 100 characters should be stored in the archive without any errors.