[9.2] (backport #11484) Add environment.yml file to diagnostics

[mergify]

What does this PR do?

Add an environment.yml file to the diagnostics bundle.

Why is it important?

Diagnostics are missing env vars that were present in previous versions.

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

N/A - restores previous functionality

How to test this PR locally

Create a diagnostics bundle

Related issues

• Closes EA Diagnostics - Env var is no more available #10966

  ---

  This is an automatic backport of pull request Add environment.yml file to diagnostics #11484 done by Mergify.

[elasticmachine]

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

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 069d871

History

• 💔 Build #31337 failed 6705b85

cc @michel-laterman