Adds fqn_for_swagger_name to bazel defs

[chriserickson]

References to other Issues or PRs

#881

Brief description of what is fixed or changed

Support for setting the fqn_for_swagger_name flag was not exposed through the bazel rules. This follows the same pattern used for json_names_for_fields, but it begs the question to me as to whether there should be a more generic way to set these arguments, as there are a lot more flags that can be set that are not exposed.

[johanbrandhorst]

I think we're happy to do these on a case by case basis for now. It's clear enough what each one does.

[johanbrandhorst]

Thanks for your contribution! Could you please cherry pick this against the v2 branch?

[chriserickson]

Sure: #1529