Enable global port listening

[jbooherl]

Add a property that enables the ability for external VMs to write to the Otel ingress porr

[acrmp]

Thanks @jbooherl!

Rather than using the boolean property, what if we instead just accepted an ingress.grpc.listen_address property so that we don't have to switch in the template?

We also have some template tests. Could you add an example for this case there?
https://github.com/cloudfoundry/otel-collector-release/blob/main/spec/support/shared_examples_for_otel_collector.rb

[jbooherl]

Sounds good, also question.. I'm not really a rubyer, when I run bundle exec rspec I get a lot of unknown keyword: :aliases Is there an easy was to fix this so I can run these tests in the future?

[ctlong]

@jbooherl it looks like @mkocher has incorporated the requested change into his PR:

• Add trace exporters #13

In that case, I think we can close out this PR, if that's alright with you?

[jbooherl]

Sounds good to me!