feat: conntrack for data aggregation

[nddq]

Description

Implement a naive conntrack map. Related to https://github.com/microsoft/retina/issues/138. Smaller PRs will be open from this PR for ease of review.

• [ ] https://github.com/microsoft/retina/pull/610
• [ ] https://github.com/microsoft/retina/pull/590 (Optional)
• [ ] https://github.com/microsoft/retina/pull/624
• [ ] packets and bytes count per direction per flow (Planned)

Related Issue

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Checklist

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[github-actions[bot]]

This PR will be closed in 7 days due to inactivity.

[github-actions[bot]]

This PR will be closed in 7 days due to inactivity.

[github-actions[bot]]

Pull request closed due to inactivity.

[nddq]

closing in favor of https://github.com/microsoft/retina/pull/624