e2e: adopt contrasttest framework

[malt3]

I tried to faithfully copy the small differences I saw between the static deployment files (emojivoto-sm-{in|e}gress) as part of generateEmojivoto.
@3u13r please confirm if my choices are correct.

[burgerdev]

lgtm

[3u13r]

I'm not sure if we want to test both the ingress and the egress separately. Currently, the "ingress" Test/Deployment also contains the egress configuration.
Either we have one (correctly named) test or we split the egress and ingress configuration.
If we choose to go with the second option, we need to configure the deployment similar to third commit of the PR: https://github.com/edgelesssys/contrast/pull/186/commits where the my "3u13r/web" image is used but the microservices use the ingress service mesh.

[malt3]

I'm not sure if we want to test both the ingress and the egress separately. Currently, the "ingress" Test/Deployment also contains the egress configuration.

Thank you for clarifying. I opted to rename the configuration to reflect that we are testing ingress and egress together.

Change requests adressed