[LocalNet] Add observability stack

[okdas]

Summary

Brings observability stack to LocalNet.

Issue

• 458

Type of change

Select one or more:

• [x] New feature, functionality or library
• [ ] Bug fix
• [ ] Code health or cleanup
• [ ] Documentation
• [ ] Other (specify)

Testing

• [ ] Unit Tests: make go_develop_and_test
• [ ] LocalNet E2E Tests: make test_e2e
• [ ] DevNet E2E Tests: Add the devnet-test-e2e label to the PR. THIS IS VERY EXPENSIVE, so only do it after all the reviews are complete.
• [x] Documentation changes: make docusaurus_start

Sanity Checklist

• [ ] I have tested my changes using the available tooling
• [ ] I have commented my code
• [ ] I have performed a self-review of my own code; both comments & source code
• [ ] I create and referenced any new tickets, if applicable
• [ ] I have left TODOs throughout the codebase, if applicable

[Olshansk]

The RelayMiner showed some data! Any idea why the validator hasn't yet?

[okdas]

Any idea why the validator hasn't yet?

Do you have this turned on or off in your config?

helm_chart_local_repo:
  enabled: true

If it is enabled, you'd need to pull in the latest changes in the chart repo. You usually don't need to turn on that feature unless you actively develop a helm chart. If it is disabled, and you still experience that issue, please let me know - we can take a look. I just double-checked and it worked on my machine.