feature request: configure codecov CLI with env vars

[mathroc]

It would be nice to be able to configure some codecov cli options via env vars, in particular I'm thinking of:

• --enterprise-url
• --git-service

since we usually need to do a few calls (do-upload and then upload-process) this would make the CI templates more readable. also, a CI job could be pre configured with the appropriate variables from the CI variable configuration or from the component catalog for gitlab