Move files from tmp dir to avoid deletion during tmp dir cleanup

[tthyer]

Issue #, if available:
https://github.com/aws-samples/aws-genomics-workflows/issues/118

Description of changes:
I have moved all the files set up by cromwell-resources.template.yaml stored in /tmp to /home/ec2-user. This is a proposal to start a conversation -- I don't believe the home directory is necessarily the best place, but I do recommend moving all files that should persist out of /tmp.

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[wleepang]

Which files are useful for a user shelling into the cromwell server instance to access? If what is needed is a place that won't get vacuumed up routinely, would a directory in /opt work?

[tthyer]

In addition to log files the users might want to see, there's the supervisor sock and pid files, and where the conf files should go.
A few suggestions follow -- I'm basing this on where supervisor says it looks for the conf file, and where sock files and log files are typically found:
/etc/supervisor/supervisord.conf
/etc/supervisor/supervisord.pid or /var/run/supervisord.pid
/var/run/supervisor.sock
/var/log/supervisord.log
/var/log/cromwell-server.log

[wleepang]

*.log files are ok to keep in /home/ec2-user/. Other operational files like supervisor.{pid,sock} probably should go somewhere a bit more out of the way like /opt or /var/run so that there is less likelihood of accidental modification or deletion.

[wleepang]

Overall, I think this is fine. If cases arise where these files get poked at unnecessarily, we can update accordingly then.