[8.14](backport #3963) Create Monitoring Azure OpenAI docs

[mergify[bot]]

This PR closes #3961.

Creates a tutorial for the Azure OpenAI integration, and should include the following sections:

• [x] Set up Azure to collect logs
  • [x] Create event hub
  • [x] Configure diagnostic settings
  • [x] Create storage account container
• [x] Set up Azure to collect metrics
  • [x] Create app registration
  • [x] Add credentials
  • [x] Add role assignment
• [x] Configure the integration
  • [x] Configure logs collection
  • [x] Configure metrics collection
• [x] Install Elastic Agent
• [x] View logs and metrics in Kibana (Overview dashboard)
• [x] Collect APM data with OTel
• [x] View APM data in Kibana.
• [x] What's next (Alerts, SLOs, ML jobs)

Example application for Azure OpenAI APM monitoring with OTel is here

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This is an automatic backport of pull request #3963 done by Mergify.

[github-actions[bot]]

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