Automatically check for Swagger changes on build

[jhelison]

Is your feature request related to a problem? Please describe.
Currently while working on the chain, the swagger file must be updated manually with make proto-swagger-gen. PRs that doesn't update the swagger file and its required should fail before merge.

Describe the solution you'd like
Create a pipeline that runs make proto-swagger-gen and fails if there is any diff created on the project.

Describe alternatives you've considered
Running make proto-swagger-gen manually on every PR

[mohitsethia]

Hi, I would like to contribute to this issue.