Change HOST/PORT env to TARGET_HOST / TARGET_PORT

[jotak]

As discussed here: #291 (comment) HOST and PORT are very generic and don't provide the meaning about what they are for; An uninformed user would probably think this would be for a server, or for the agent host itself, rather than a target of flow/packet collectors.

Description

Dependencies

n/a

Checklist

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• Will this change affect NetObserv / Network Observability operator? If not, you can ignore the rest of this checklist.
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• QE requirements (check 1 from the list):
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[github-actions]

New image:
quay.io/netobserv/netobserv-ebpf-agent:ff5ff28

It will expire after two weeks.

To deploy this build, run from the operator repo, assuming the operator is running:

USER=netobserv VERSION=ff5ff28 make set-agent-image

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 34.04%. Comparing base (08030df) to head (880e127).
Report is 1 commits behind head on main.

Files	Patch %	Lines
pkg/agent/agent.go	0.00%	6 Missing ⚠️
pkg/agent/config.go	0.00%	3 Missing ⚠️
pkg/agent/packets_agent.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #303   +/-   ##
=======================================
  Coverage   34.04%   34.04%           
=======================================
  Files          47       47           
  Lines        3836     3836           
=======================================
  Hits         1306     1306           
  Misses       2444     2444           
  Partials       86       86           

Flag	Coverage Δ
unittests	34.04% <0.00%> (ø)

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[msherif1234]

/lgtm

[msherif1234]

/approve

[openshift-ci]

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[jpinsonneau]

Sure, thanks for the update @jotak