update sample app to support local plugin

[logonoff]

Depends on #281

[openshift-ci]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.20%. Comparing base (44df068) to head (0cccd97).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #279   +/-   ##
=======================================
  Coverage   25.20%   25.20%           
=======================================
  Files          40       40           
  Lines        1210     1210           
  Branches      244      244           
=======================================
  Hits          305      305           
  Misses        889      889           
  Partials       16       16           

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[openshift-ci]

@logonoff: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/all-packages	bb553ef	link	true	/test all-packages

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