Add yourkit to production

[dwwoelfel]

Adds yourkit to production with a new scripts/yourkit_tunnel.sh to connect.

I have it running on a staging server, but I can't test it out yet because my trial is expired and waiting to hear back from the yourkit folks.

Also updates the prod_tunnel script to take an optional --instance-id arg and an optional --port arg.

[github-actions[bot]]

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