[?] Make ansible-playbook parameterizable in otel-ec2 terraform

[rubenruizdegauna]

Right now the playbook is hardcoded. It should come from a variable with a default value but be able to override it and this way we can use custom variables too

https://github.com/newrelic-experimental/otel-env-provisioner/blob/main/terraform/otel-ec2/main.tf#L52