Taskotron dev and stg deployment

[Tim Flink]

This has taken a bit longer than I wanted it to but we have a mostly
working taskotron dev instance at:

https://taskotron-dev.fedoraproject.org/

This is 100% deployed from infra's ansible repo but other than the
proxy configuration for resultsdb, it should be pretty much the same
thing as what's currently deployed for taskotron-stg.

The only issues that I'm aware of are proxy handling issues in
resultsdb_frontend:

https://phab.qadevel.cloud.fedoraproject.org/T276
https://phab.qadevel.cloud.fedoraproject.org/T277

T276 needs to be fixed before we deploy to production. I can take a
look at it on Monday but it would be nice to have a fix before the.

For the staging env, I've gotten started on it but haven't gotten any
farther than building the clients. Tomorrow is a US holiday but I'm
planning to have stg deployed early next week.

Tim