[receiver/awsecscontainermetricsreceiver] Fix possible sigsegv in shutdown

[bryan-aguilar]

Description: Fix possible sigsev error that could occur during shutdown if component was not correctly initialized.

Link to tracking Issue: Reported in ADOT downstream repository aws-observability/aws-otel-collector#982 (comment)

[runforesight]

Foresight Summary

    
Major Impacts

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

TestMySqlIntegration/Running_mysql_version_8.0 ❌ failed 1 times in 2 runs (50% fail rate).

build-and-test-windows duration(3 seconds) has decreased 42 minutes 10 seconds compared to main branch avg(42 minutes 13 seconds).

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✅  check-links workflow has finished in 45 seconds (1 minute 50 seconds less than main branch avg.) and finished at 17th Feb, 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 19 seconds (1 minute 48 seconds less than main branch avg.) and finished at 17th Feb, 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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✅  prometheus-compliance-tests workflow has finished in 5 minutes 22 seconds (3 minutes 24 seconds less than main branch avg.) and finished at 17th Feb, 2023.

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

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✅  load-tests workflow has finished in 15 minutes 53 seconds and finished at 17th Feb, 2023.

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

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✅  e2e-tests workflow has finished in 15 minutes 37 seconds and finished at 17th Feb, 2023.

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Job	Failed Steps	Tests
kubernetes-test	-     🔗	N/A	See Details

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⭕  build-and-test-windows workflow has finished in 3 seconds (42 minutes 10 seconds less than main branch avg.) and finished at 20th Feb, 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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✅  changelog workflow has finished in 4 minutes 55 seconds (⚠️ 2 minutes 20 seconds more than main branch avg.) and finished at 20th Feb, 2023.

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

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✅  build-and-test workflow has finished in 6 minutes 53 seconds (1 hour 0 minutes 20 seconds less than main branch avg.) and finished at 20th Feb, 2023.

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Job	Failed Steps	Tests
build-package (deb)	-     🔗	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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[Aneurysm9]

Please add a changelog entry.

[bryan-aguilar]

Please add a changelog entry.

Doh! My bad. Coming right up