[8.x](backport #6539) Add otel components command

[mergify]

What does this PR do?

This PR adds the components command for otel mode as described at https://github.com/elastic/opentelemetry-dev/issues/396.

Implementation is replicated from https://github.com/open-telemetry/opentelemetry-collector/blob/main/otelcol/command_components.go.

Why is it important?

otel components command can be used to list the supported components the EDOT includes.

Checklist

• I have read and understood the pull request guidelines of this project.
• 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

How to test this PR locally

Build Elastic Agent and execute the command:

./build/elastic-agent otel components          
buildinfo:
    command: ./build/elastic-agent
    description: Elastic opentelemetry-collector distribution
    version: 9.0.0
receivers:
    - name: filebeatreceiver
      stability:
        logs: Alpha
        metrics: Undefined
        traces: Undefined
    - name: filelog
      stability:
        logs: Beta
        metrics: Undefined
        traces: Undefined
    - name: hostmetrics
      stability:
        logs: Development
        metrics: Beta
        traces: Undefined
    - name: httpcheck
      stability:
        logs: Undefined
        metrics: Alpha
        traces: Undefined
    - name: jaeger
      stability:
        logs: Undefined
        metrics: Undefined
        traces: Beta
    - name: k8s_cluster
      stability:
        logs: Beta
        metrics: Beta
        traces: Undefined
    - name: k8sobjects
      stability:
        logs: Beta
        metrics: Undefined
        traces: Undefined
    - name: kubeletstats
      stability:
        logs: Undefined
        metrics: Beta
        traces: Undefined
    - name: metricbeatreceiver
      stability:
        logs: Alpha
        metrics: Undefined
        traces: Undefined
    - name: otlp
      stability:
        logs: Beta
        metrics: Stable
        traces: Stable
    - name: prometheus
      stability:
        logs: Undefined
        metrics: Beta
        traces: Undefined
    - name: zipkin
      stability:
        logs: Undefined
        metrics: Undefined
        traces: Beta
processors:
    - name: attributes
      stability:
        logs: Beta
        metrics: Beta
        traces: Beta
    - name: batch
      stability:
        logs: Beta
        metrics: Beta
        traces: Beta
    - name: elasticinframetrics
      stability:
        logs: Undefined
        metrics: Alpha
        traces: Undefined
    - name: elastictrace
      stability:
        logs: Undefined
        metrics: Undefined
        traces: Alpha
    - name: filter
      stability:
        logs: Alpha
        metrics: Alpha
        traces: Alpha
    - name: k8sattributes
      stability:
        logs: Beta
        metrics: Beta
        traces: Beta
    - name: lsminterval
      stability:
        logs: Undefined
        metrics: Development
        traces: Undefined
    - name: memory_limiter
      stability:
        logs: Beta
        metrics: Beta
        traces: Beta
    - name: resource
      stability:
        logs: Beta
        metrics: Beta
        traces: Beta
    - name: resourcedetection
      stability:
        logs: Beta
        metrics: Beta
        traces: Beta
    - name: transform
      stability:
        logs: Alpha
        metrics: Alpha
        traces: Alpha
exporters:
    - name: debug
      stability:
        logs: Development
        metrics: Development
        traces: Development
    - name: elasticsearch
      stability:
        logs: Beta
        metrics: Development
        traces: Beta
    - name: file
      stability:
        logs: Alpha
        metrics: Alpha
        traces: Alpha
    - name: loadbalancing
      stability:
        logs: Beta
        metrics: Development
        traces: Beta
    - name: otlp
      stability:
        logs: Beta
        metrics: Stable
        traces: Stable
    - name: otlphttp
      stability:
        logs: Beta
        metrics: Stable
        traces: Stable
connectors:
    - name: routing
      stability:
        logs-to-logs: Alpha
        logs-to-metrics: Undefined
        logs-to-traces: Undefined
        metrics-to-logs: Undefined
        metrics-to-metrics: Alpha
        metrics-to-traces: Undefined
        traces-to-logs: Undefined
        traces-to-metrics: Undefined
        traces-to-traces: Alpha
    - name: signaltometrics
      stability:
        logs-to-logs: Undefined
        logs-to-metrics: Alpha
        logs-to-traces: Undefined
        metrics-to-logs: Undefined
        metrics-to-metrics: Alpha
        metrics-to-traces: Undefined
        traces-to-logs: Undefined
        traces-to-metrics: Alpha
        traces-to-traces: Undefined
    - name: spanmetrics
      stability:
        logs-to-logs: Undefined
        logs-to-metrics: Undefined
        logs-to-traces: Undefined
        metrics-to-logs: Undefined
        metrics-to-metrics: Undefined
        metrics-to-traces: Undefined
        traces-to-logs: Undefined
        traces-to-metrics: Alpha
        traces-to-traces: Undefined
extensions:
    - name: file_storage
      stability:
        extension: Beta
    - name: health_check
      stability:
        extension: Beta
    - name: memory_limiter
      stability:
        extension: Development
    - name: pprof
      stability:
        extension: Beta

Related issues

• Closes https://github.com/elastic/opentelemetry-dev/issues/396

Questions to ask yourself

• How are we going to support this in production?
• How are we going to measure its adoption?
• How are we going to debug this?
• What are the metrics I should take care of?
• ...

---

This is an automatic backport of pull request #6539 done by [Mergify](https://mergify.com).

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[mergify]

This pull request has not been merged yet. Could you please review and merge it @ChrsMark? 🙏

[elastic-sonarqube]

Quality Gate failed

Failed conditions
13.1% Coverage on New Code (required ≥ 40%)

See analysis details on SonarQube