NETOBSERV-59 Add tcp flow stream exporter

[jpinsonneau]

Description

This PR add TCP flow stream exporter for cli.

Dependencies

https://github.com/netobserv/network-observability-cli/pull/1

Checklist

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• QE requirements (check 1 from the list):
  • [ ] Standard QE validation, with pre-merge tests unless stated otherwise.
  • [ ] Regression tests only (e.g. refactoring with no user-facing change).
  • [ ] No QE (e.g. trivial change with high reviewer's confidence, or per agreement with the QE team).

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[codecov[bot]]

Codecov Report

Attention: 48 lines in your changes are missing coverage. Please review.

Comparison is base (0c43b4a) 33.62% compared to head (ce87754) 33.17%.

Files	Patch %	Lines
pkg/exporter/flows.go	0.00%	37 Missing :warning:
pkg/agent/agent.go	0.00%	11 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #224 +/- ## ========================================== - Coverage 33.62% 33.17% -0.46% ========================================== Files 39 40 +1 Lines 3494 3542 +48 ========================================== Hits 1175 1175 - Misses 2251 2299 +48 Partials 68 68 ``` | [Flag](https://app.codecov.io/gh/netobserv/netobserv-ebpf-agent/pull/224/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=netobserv) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/netobserv/netobserv-ebpf-agent/pull/224/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=netobserv) | `33.17% <0.00%> (-0.46%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=netobserv#carryforward-flags-in-the-pull-request-comment) to find out more.

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[jotak]

Why not using the existing grpc exporter with the CLI ? Does it come with additional challenges?

[msherif1234]

Why not using the existing grpc exporter with the CLI ? Does it come with additional challenges?

I asked the exact same question https://github.com/netobserv/network-observability-cli/pull/1#discussion_r1397326137

thinking more about this it might even be better to run in the same process of ebpf agent and consume directly ebpf records like what the direct flp did ? WDYT ?

[jpinsonneau]

Closing this in favor of https://github.com/netobserv/netobserv-ebpf-agent/pull/291