Charts[Test] Implement smoke tests for otel-collector ports and telemetry data

[leninmehedy]

Description

We need a helm-test that ensures open-telemetry ports are working and telemetry data can be received.

Thoughts

Currently we are running helm tests before node setup, so it is not possible to ensure actual telemetry data are received from hedera platform softwares. So we need to run mock telemetry services inside the pods for these tests; however this requires that we are using a root-container image (full-stack-testing/ubi8-init-dind) that has docker installed.

Some manual tests were conducted for this earlier with mock services, so we can automate those in a helm-test: #298

Here is an example how we can test otel-collector's functionality manually: https://github.com/hashgraph/full-stack-testing/tree/main/dev/telemetry