[confgenerator] Migrate important Self Log signals to Otel Logging.

[franciscovalentecastro]

Description

This PR refactors fluent-bit self log pipelines and coverts them into default on Otel Logging pipelines. This are the two log signals that are refactored :

• health_checks.log : This file is tailed and structured to have some labels about the agent.
• Logging Ping : This is a DEBUG log that is sent every 10 minutes to verify GCL logs export is working.

This signals should the have the following labels :

• "agent.googleapis.com/health/agentVersion" = "2.x.x"
• "agent.googleapis.com/health/agentKind" = "ops-agent"
• "agent.googleapis.com/health/schemaVersion" = "v1"

The tailing of "logging_module.log" is left as a Fluent-bit Pipeline which will be deleted in Ops Agent 3.0.

Related issue

b/540427023

How has this been tested?

Checklist:

• Unit tests
  • Unit tests do not apply.
  • Unit tests have been added/modified and passed for this PR.
• Integration tests
  • Integration tests do not apply.
  • Integration tests have been added/modified and passed for this PR.
• Documentation
  • This PR introduces no user visible changes.
  • This PR introduces user visible changes and the corresponding documentation change has been made.
• Minor version bump
  • This PR introduces no new features.
  • This PR introduces new features, and there is a separate PR to bump the minor version since the last release already.
  • This PR bumps the version.

[rafaelwestphal]

Can you make sure the tests are passing here? I see TestLoggingSelfLogs is failing

[franciscovalentecastro]

Can you make sure the tests are passing here? I see TestLoggingSelfLogs is failing

I fixed the bug in TestLoggingSelfLogs (the logging ping was missing). It is passing now, modulo the test flakes. PTAL.