Check ingress_controller fileset compatibility with newer versions

[andresrc]

According to the documentation, the ingress_controller fileset has been tested with version 0.28.0 of ingress-nginx.

However, there have been multiple additional releases (up to 3.x). We should check whether the fileset works with newer versions and document it.

[elasticmachine]

Pinging @elastic/integrations-platforms (Team:Platforms)

[ChrsMark]

Thanks for opening this @andresrc . The thing here is that versioning is a little bit tricky. Note that there is versions like 3.x named ingress-nginx-3.2.0 and versions like v0.35.0 named controller-v0.35.0.
3.2.0 is the helm chart version, in that chart is running ingress controller version 0.35.0.

The version we are interested in is just the controller version.
So we tested the fileset with 0.28.0 and now the latest version of the service is 0.35.0 means that we have not diverge so much. I will verify with this latest version and update the docs.