Use ingress for e2e tests

[pablochacin]

Description

Set up an ingress controller for e2e test clusters and expose services using ingresses instead of node ports.
This will allow multiple test cases of the same test to run concurrently on the same cluster without collision.

It is a step towards solving #147 but different tests still need to use different host ports to avoid conflicts.
This limitation will be addressed in a follow-up PR.

Fixes #

Checklist:

• My code follows the coding style of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works.
• Any dependent changes have been merged and published in downstream modules