Add a flag to export the output of jf audit command in a file.

[shashwathrai]

Is your feature request related to a problem? Please describe.
Add a flag to export the output of jf audit command in a file. From the command line, we can export the output to a file using the > command. However in the Jenkins pipeline script to run the command within sh we need to provide the actual path of the JFrog CLI installation. For example:
sh "/Users/shashwathr/.jenkins/tools/io.jenkins.plugins.jfrog.JfrogInstallation/jf/jf audit xxx > $WORKSPACE/audit-report.json"

Describe the solution you'd like to see
Any flag to export the data into a file within JFrog CLI.

Describe alternatives you've considered
We can provide the actual path of the JFrog CLI installation.

[tim-goto]

This would be useful not only for the audit subcommand but any command really.. especially in the context of the new jfrog jenkins plugin I could not find a way to reliably parse the output of the jf command (piping to file doesn't work since you need to run the commands in the jf step not in a sh, tee also writes the summary line, ...)