T6953: merges node and frr exporter under prometheus section

[nvollmar]

Change Summary

Gather all prometheus exporters under the config section prometheus similar to telegraph

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe): config/code consolidation (requires config migration)

Related Task(s)

https://vyos.dev/T6953

Related PR(s)

• T6953: update monitoring documentation vyos-documentation#1580

Component(s) name

monitoring

Proposed changes

Moving currently separate node-exporter and frr-exporter under prometheus umbrella.

How to test

set service monitoring prometheus node-exporter listen-address 192.0.2.1
set service monitoring prometheus frr-exporter listen-address 192.0.2.1

Smoketest result

DEBUG - Running Testcase: /usr/libexec/vyos/tests/smoke/cli/test_service_monitoring_prometheus.py
DEBUG - test_01_node_exporter (__main__.TestMonitoringPrometheus.test_01_node_exporter) ... ok
DEBUG - test_02_frr_exporter (__main__.TestMonitoringPrometheus.test_02_frr_exporter) ... ok

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[github-actions]

👍
No issues in PR Title / Commit Title

[github-actions]

✅ No issues found in unused-imports check.. Please refer the workflow run

[nvollmar]

failing tests don't seem to be related to this changes

[github-actions]

CI integration ❌ failed!

Details

CI logs

• CLI Smoketests (no interfaces) ❌ failed
• CLI Smoketests (interfaces only) ❌ failed
• Config tests 👍 passed
• RAID1 tests 👍 passed
• TPM tests 👍 passed