[CI] Automation of Multi-Cluster E2E Travis Testing

[dmatch01]

Testing for multi-cluster mode to be added to Travis.

[dmatch01]

@asm582 Your guidance on getting started on this to follow recent new process is appreciated.

[asm582]

@dmatch01 we have moved to github actions. can we create an ADR for your proposal please, here is the ADR repo: https://github.com/project-codeflare/adr

[asm582]

@dmatch01 I think we should start with documentation PR on how to deploy MCAD in multi-cluster mode and provide sample AWs as a starting point.