Asset Inventory POC structrue & EC2 Implementation

[romulets]

Summary of your changes

As part of testing some technical concepts for the Asset Inventory project a new cloudbeat flavour is being added to hold the Asset Inventory Proof of Concept.

This PR adds a new flavour and implements EC2 fetching

to remove the host data configure cloudbeat.yml with:

processors:
  - drop_fields:
      fields: ["host.name"]
#  - add_host_metadata: ~
#  - add_cloud_metadata : ~
#  - add_docker_metadata: ~

Screenshot/Data

Related Issues

• Related: https://github.com/elastic/security-team/issues/8710

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary README/documentation (if appropriate)

[mergify]

This pull request does not have a backport label. Could you fix it @romulets? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v./d./d./d is the label to automatically backport to the 8./d branch. /d is the digit
  NOTE: backport-skip has been added to this pull request.

[github-actions]

📊 Allure Report - 💚 No failures were reported.

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[kubasobon]

I like the design, left some questions and minor comments.

[kubasobon]

This looks like a leftover TODO

[romulets]

Jah, it's indeed. For the poc I decided to keep it here, I don't see a reason to make it an external configuration.

Do you disagree?

[kubasobon]

Makes sense to me. Just making sure you haven't missed it by accident :)

[kubasobon]

Looks good to me, my concerns were addressed