[APMON-284] Add support of APM Single Step Instrumentation in helm

[liliyadd]

What this PR does / why we need it:

Starting from release 7.49.x, cluster agent supports Single Step Instrumentation. This change allows configuring Single Step Instrumentation during agent installation with Helm.

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Chart Version bumped
• Documentation has been updated with helm-docs (run: .github/helm-docs.sh)
• CHANGELOG.md has been updated
• Variables are documented in the README.md
• For Datadog Operator chart or value changes update the test baselines (run: make update-test-baselines)

[clamoriniere]

overall, the PR looks good.

could you add a new ci values.yaml to test the new parameter here: https://github.com/DataDog/helm-charts/tree/main/charts/datadog/ci

[liliyadd]

I think the current failure in the pipeline tests are not related to the change introduced by this PR:
Error: INSTALLATION FAILED: execution error at (datadog/templates/daemonset.yaml:111:12): Container runtime support has to be enabled for container image collection to work. Please enable it using datadog.containerRuntimeSupport.enabled.

[clamoriniere]

the change added looks good.

But it is missing the part that check that the admission controller feature is enabled in the cluster-agent. (the option clusterAgent.admissionController.enabled is true by default but it can be good to verify that is was not disable on purpose by a user.)

[liliyadd]

I didn't realize all commits need to be signed 😭 I cannot merge this PR, so created #1245

[liliyadd]

Closing as this logic has been merged in #1245