add mocks to cli

[jpinsonneau]

Description

Add very simple mocks to the CLI to avoid running the whole stack for UI changes.

Dependencies

n/a

Checklist

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• Is this PR backed with a JIRA ticket? If so, make sure it is written as a title prefix (in general, PRs affecting the NetObserv/Network Observability product should be backed with a JIRA ticket - especially if they bring user facing changes).
• Does this PR require product documentation?
  • If so, make sure the JIRA epic is labelled with "documentation" and provides a description relevant for doc writers, such as use cases or scenarios. Any required step to activate or configure the feature should be documented there, such as new CRD knobs.
• Does this PR require a product release notes entry?
  • If so, fill in "Release Note Text" in the JIRA.
• Is there anything else the QE team should know before testing? E.g: configuration changes, environment setup, etc.
  • If so, make sure it is described in the JIRA ticket.
• 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).

[openshift-ci]

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[codecov]

Codecov Report

Attention: Patch coverage is 4.44444% with 43 lines in your changes missing coverage. Please review.

Project coverage is 24.26%. Comparing base (0398f3b) to head (94cb017).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/mocks.go	0.00%	37 Missing ⚠️
cmd/root.go	33.33%	4 Missing ⚠️
cmd/flow_capture.go	0.00%	1 Missing ⚠️
cmd/packet_capture.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #92      +/-   ##
==========================================
- Coverage   25.08%   24.26%   -0.83%     
==========================================
  Files           8        9       +1     
  Lines        1148     1191      +43     
==========================================
+ Hits          288      289       +1     
- Misses        839      881      +42     
  Partials       21       21              

Flag	Coverage Δ
unittests	24.26% <4.44%> (-0.83%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
cmd/flow_capture.go	31.64% <0.00%> (-0.10%)	⬇️
cmd/packet_capture.go	0.00% <0.00%> (ø)
cmd/root.go	45.65% <33.33%> (-1.97%)	⬇️
cmd/mocks.go	0.00% <0.00%> (ø)

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