[RFR] Add 'env' field to IQE CJI spec

[bsquizz]

Adds an env field to the IQE CJI spec which allows anyone invoking a CJI to set a list of EnvVars that will be passed on to the IQE Job pod.

We will mark most of the fields that Clowder has been parsing and setting on the Job's pod here as deprecated and instead we'll begin to have the bonfire IQE CJI template define the structure of these env vars itself. We will also need to make sure anyone invoking a CJI without using bonfire updates their resource config before we remove the deprecated fields.

At the moment while both the "old fields" and the "new" env field exist, the behavior will be:

1. First parse and set the env vars as we currently do in the code
2. Add any vars set in env to the array
3. If the name of any vars in env conflict with those already set in step 1, we will override whatever is currently set in the array and use the value defined in the env block.