test: move unused samples

[qinqingxu]

1. Move the unused sample case to a new folder "unuse-ui-test"
2. Remove two sample case from the pvt list, because they are not existent in the sample.config.json file.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.46%. Comparing base (ba75ce9) to head (35e21f7).
⚠️ Report is 2 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #15077   +/-   ##
=======================================
  Coverage   89.46%   89.46%           
=======================================
  Files         606      606           
  Lines       37242    37242           
  Branches     7605     7570   -35     
=======================================
  Hits        33318    33318           
  Misses       1837     1837           
  Partials     2087     2087           

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