Remove Export from cf direct keys

[moukoublen]

Summary of your changes

The Export feature within the Output section allows you to create a named export that other CloudFormation stacks can import. It is not actually needed, and it seems to cause some internal failure when we deploy multiple stacks with output exports.

Screenshot/Data

Related Issues

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)

Introducing a new rule?

• Generate rule metadata using this script
• Add relevant unit tests
• Generate relevant rule templates using this script, and open a PR in elastic/packages/cloud_security_posture

[mergify]

This pull request does not have a backport label. Could you fix it @moukoublen? 🙏
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.

Result	Count
🟥 Failed	0
🟩 Passed	359
⬜ Skipped	33