Add quick filters for external traffic

[jotak]

Description

Now that external traffic detection starts getting quite accurate, adding a quick filter looks like a quick win:

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).
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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).

[openshift-ci]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.66%. Comparing base (32c1efc) to head (02e7ac1).
⚠️ Report is 18 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2271      +/-   ##
==========================================
+ Coverage   72.54%   72.66%   +0.12%     
==========================================
  Files          88       88              
  Lines        9677     9677              
==========================================
+ Hits         7020     7032      +12     
+ Misses       2219     2210       -9     
+ Partials      438      435       -3     

Flag	Coverage Δ
unittests	72.66% <ø> (+0.12%)	⬆️

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

Files with missing lines	Coverage Δ
api/flowcollector/v1beta2/flowcollector_types.go	100.00% <ø> (ø)

... and 6 files with indirect coverage changes

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[openshift-merge-robot]

PR needs rebase.

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