CherryPicked: [cnv-4.21] Remove redundant and duplicated by upstream t2 tests - #5930

utilities-unittests: OK ✔ in 14 minutes 9.93 seconds
pytest-check-arm64: OK ✔ in 14 minutes 16.56 seconds
pytest-check-s390x: OK ✔ in 14 minutes 18.04 seconds
pytest-check-x86: OK ✔ in 18 minutes 11.12 seconds
  pytest-check-x86: OK (1091.12=setup[121.66]+cmd[742.74,19.39,7.84,12.49,6.33,11.61,13.56,8.80,146.71] seconds)
  pytest-check-arm64: OK (856.56=setup[113.15]+cmd[743.41] seconds)
  pytest-check-s390x: OK (858.04=setup[111.14]+cmd[746.90] seconds)
  unused-code: OK (1172.58=setup[1141.02]+cmd[31.56] seconds)
  utilities-unittests: OK (849.93=setup[113.25]+cmd[736.29,0.39] seconds)
  congratulations :) (1172.77 seconds)