[feat] Collect License Report

[bunchc]

Add functionality to collect a license report when "license_report": true is set in envs.json. License report should be stored as a json file should be named yyyy-mm-dd-environment.json and compressed (along with the rest of the output) into the file specified by -o yyyy-mm-dd-output.zip

[dlamotta]

Done; there is potential for reopening the issue if we need to rename the license report files generated.