Add deploy test coverage

General MR

Summary

Adds additional test coverage for deploy output schemas, Flux deploy command, and Big Bang deploy command.

Relevant logs/screenshots

Coverage Updates

File	Old	New
cmd/deploy/bigbang.go	81.9%	92.3%
cmd/deploy/flux.go	82.7%	93.3%
util/output/schemas/deploy_schemas	42.9%	100%

Upgrade Notices

N/A