Add AKS Container Insights Test

[Paamicky]

Description of the issue

The agent translates OTEL Container Insights configs at runtime, including the AKS/GKE path, but CI had no job that runs Container Insights on a real AKS cluster. Only the OTLP AKS suite existed, we needed to add a CI test to make sure the agent is able to translate and deliver metrics and logs to CloudWatch in AKS mode.

Description of changes

Adds a CI job to trigger the new AKS Container Insights integration test:

• New AKSContainerInsightsIntegrationTest job in test-artifacts.yml, mirroring the existing AKS OTLP job, passing test_mode=containerinsights and test_dir=./test/azure/aks/containerinsights.
• Tightened the existing AKSIntegrationTest filter from a substring match to an exact match on ./test/azure/aks, so targeting the CI subdirectory no longer also triggers the OTLP job.

Tests

• End-to-end test for AKS Container Insights tests: AKS-container-insights
• AKS metics verified in CloudWatch:
  • Node metrics: cadvisor, kubeletstats, node-exporter
  • Cluster metrics: kube-state-metrics, apiserver, control plane metrics (apiserver)
  • Node logs: application and host container logs
  • Solution metrics: Keda and Karpenter

Warning

These PR's needs to merge first for this test to pass:

• AKS/GKE helm parity: AKS/GKE OTel Container Insights parity with helm #2283
• AKS Container insights test: Add AKS Container Insights tests amazon-cloudwatch-agent-test#762

Requirements

1. Run make fmt and make fmt-sh
2. Run make lint

License

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Integration Tests

To run integration tests against this PR, add the ready for testing label.

[olowosulu]

LGTM once the merge order is settled. One condition:

• [MAJOR] Merge order: this job passes -var="test_mode=containerinsights", a variable that only exists once Add AKS Container Insights tests amazon-cloudwatch-agent-test#762 lands. Until then, apply/destroy fail with Value for undeclared variable: test_mode on the ./test/azure, '', and containerinsights filters. Please gate this on support terraform_dir param in integration Github action #762 (and AKS/GKE OTel Container Insights parity with helm #2283) merging first.

[Paamicky]

LGTM once the merge order is settled. One condition:

• [MAJOR] Merge order: this job passes -var="test_mode=containerinsights", a variable that only exists once Add AKS Container Insights tests amazon-cloudwatch-agent-test#762 lands. Until then, apply/destroy fail with Value for undeclared variable: test_mode on the ./test/azure, '', and containerinsights filters. Please gate this on support terraform_dir param in integration Github action #762 (and AKS/GKE OTel Container Insights parity with helm. #2283) merging first.

Intent is right and it's handled by merge order.