Backport d97a3dc from #2984.

What does this PR do?

This commit adds the schema required to utilize the DatadogInstrumentation CRD for APM. Relates to #2962

Example

apiVersion: datadoghq.com/v1alpha1
kind: DatadogInstrumentation
metadata:
  name: redis-check
  namespace: cache
spec:
  targetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: example-service
  config:
    apm:
      enabled: true
      ddTraceVersions:
        python: "3"
      ddTraceConfigs:
        - name: "DD_PROFILING_ENABLED"
          value: "true"

Motivation

Two relevant RFCs:

• RFC: Datadog Instrumentation CRD
• DatadogInstrumentation CRD for Workload-Scoped Product Enablement

Additional Notes

All this adds is the schema. The consumer of this schema is the Datadog Cluster Agent.

Describe your test plan

Ran:

make generate
make manifests
go test ./api/...
bin/darwin-arm64/operator-sdk bundle validate ./bundle

Also verified make generate && make manifests produces no additional diff after generated files are up to date.

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label
• All commits are signed (see: signing commits)