Add support for hostAliases

[DenisGarciaFr]

Describe the solution you'd like
We are looking at adding entries to /etc/hosts of our pods. We'd like to take advantage of the hostAliases configuration we can add to a deployment (container spec)

Describe alternatives you've considered
We have considered not using Kubernetes configuration and adding those entries to our Docker images directly, but it is much less

Additional context
Example of Kubernetes configuration

spec:
  [...]
  template:
    [...]
    spec:
      hostAliases:
        - ip: 10.1.2.3
          hostnames:
            - domain.name1.com
            - domain.name2.com

How it could look like in terraform

   hostAliases = {
      "10.1.2.3" = ["domain1.com", "domain2.com"]
      "10.1.2.4" = ["domain3.com"]
      "10.1.2.5" = ["domain4.com"]
  }