fix: Datadog not been managed by argocd

[nahum-landa]

this will make the app of apps work for datadog.

What does this PR do?

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Motivation

• Resolves #

More

• [x] Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• [x] Yes, I have added a new example under examples to support my PR
• [x] Yes, I have created another PR for add-ons under add-ons repo (if applicable)
• [x] Yes, I have updated the docs for this feature
• [x] Yes, I ran pre-commit run -a with this PR

Note: Not all the PRs require a new example and/or doc page. In general:

• Use an existing example when possible to demonstrate a new addons usage
• A new docs page under docs/add-ons/* is required for new a new addon

For Moderators

• [ ] E2E Test successfully complete before merge?

Additional Notes