[mdatagen] only generate metrics if metrics are present

[codeboten]

This allows us to define metadata.yaml files for components that don't generate metrics.

Related to #19175

[runforesight]

Foresight Summary

    
Major Impacts

TestElasticsearchIntegration ❌ failed 1 times in 2 runs (50% fail rate).

TestElasticsearchIntegration/Running_elasticsearch_7.16.3 ❌ failed 1 times in 2 runs (50% fail rate).

build-and-test-windows duration(5 seconds) has decreased 39 minutes 24 seconds compared to main branch avg(39 minutes 29 seconds).

View More Details

⭕  build-and-test-windows workflow has finished in 5 seconds (39 minutes 24 seconds less than main branch avg.) and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
windows-unittest-matrix	-     🔗	N/A	See Details
windows-unittest	-     🔗	N/A	See Details

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✅  check-links workflow has finished in 47 seconds and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
changed files	-     🔗	N/A	See Details
check-links	-     🔗	N/A	See Details

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✅  telemetrygen workflow has finished in 1 minute 2 seconds (42 seconds less than main branch avg.) and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
build-dev	-     🔗	N/A	See Details
publish-latest	-     🔗	N/A	See Details
publish-stable	-     🔗	N/A	See Details

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✅  changelog workflow has finished in 2 minutes 9 seconds and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
changelog	-     🔗	N/A	See Details

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✅  prometheus-compliance-tests workflow has finished in 3 minutes 52 seconds (3 minutes 20 seconds less than main branch avg.) and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
prometheus-compliance-tests	-     🔗	✅ 21  ❌ 0  ⏭ 0    🔗	See Details

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✅  e2e-tests workflow has finished in 12 minutes 48 seconds (2 minutes 20 seconds less than main branch avg.) and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
kubernetes-test (v1.26.0)	-     🔗	N/A	See Details
kubernetes-test (v1.25.3)	-     🔗	N/A	See Details
kubernetes-test (v1.24.7)	-     🔗	N/A	See Details
kubernetes-test (v1.23.13)	-     🔗	N/A	See Details

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✅  load-tests workflow has finished in 16 minutes 42 seconds (⚠️ 4 minutes 12 seconds more than main branch avg.) and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
loadtest (TestTraceAttributesProcessor)	-     🔗	✅ 3  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestIdleMode)	-     🔗	✅ 1  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetric10kDPS|TestMetricsFromFile)	-     🔗	✅ 6  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceNoBackend10kSPS|TestTrace1kSPSWithAttrs)	-     🔗	✅ 8  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceBallast1kSPSWithAttrs|TestTraceBallast1kSPSAddAttrs)	-     🔗	✅ 10  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetricResourceProcessor|TestTrace10kSPS)	-     🔗	✅ 12  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestBallastMemory|TestLog10kDPS)	-     🔗	✅ 18  ❌ 0  ⏭ 0    🔗	See Details
setup-environment	-     🔗	N/A	See Details

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✅  build-and-test workflow has finished in 36 minutes 43 seconds (17 minutes 24 seconds less than main branch avg.) and finished at 17th Mar, 2023.

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Job	Failed Steps	Tests
integration-tests	-     🔗	✅ 55  ❌ 0  ⏭ 0    🔗	See Details
cross-compile (darwin, amd64)	-     🔗	N/A	See Details
cross-compile (darwin, arm64)	-     🔗	N/A	See Details
cross-compile (linux, 386)	-     🔗	N/A	See Details
cross-compile (linux, amd64)	-     🔗	N/A	See Details
cross-compile (linux, arm)	-     🔗	N/A	See Details
cross-compile (linux, arm64)	-     🔗	N/A	See Details
cross-compile (linux, ppc64le)	-     🔗	N/A	See Details
cross-compile (windows, 386)	-     🔗	N/A	See Details
cross-compile (windows, amd64)	-     🔗	N/A	See Details
build-package (deb)	-     🔗	N/A	See Details
build-package (rpm)	-     🔗	N/A	See Details
windows-msi	-     🔗	N/A	See Details
publish-check	-     🔗	N/A	See Details
publish-stable	-     🔗	N/A	See Details
publish-dev	-     🔗	N/A	See Details

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🔎 See details on Foresight

^{*You can configure Foresight comments in your organization settings page.}