[8.16](backport #5853) [helm]: integration config for scheduler and controller-manager conditions and containers logs

[mergify]

What does this PR do?

I was testing k8s standalone elastic-agent using the plain k8s manifest under deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml but I also tried to get the same results with the elastic-agent helm chart and I tried to replicate the produced data with the elastic-agent helm chart. This effort uncovered some yaml format issues and some inconsistencies for container logs which this PR handles

Why is it important?

Because it fixes bugs 🙂

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool
• I have added an integration test or an E2E test

Disruptive User Impact

N/A

How to test this PR locally

 mage integration:kubernetesMatrix

Related issues

-

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This is an automatic backport of pull request #5853 done by Mergify.

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube