[4.21][Storage] Manual Cherry-Pick: Add Velero backup hooks opt-out tests - #5924

pytest-check-arm64: OK ✔ in 1 minute 32.09 seconds
pytest-check-s390x: OK ✔ in 1 minute 35.02 seconds
utilities-unittests: OK ✔ in 1 minute 41.31 seconds
unused-code: OK ✔ in 4 minutes 26.71 seconds
  pytest-check-x86: OK (541.61=setup[28.71]+cmd[66.53,16.71,30.21,18.75,35.77,27.71,77.81,8.46,230.95] seconds)
  pytest-check-arm64: OK (92.09=setup[27.85]+cmd[64.24] seconds)
  pytest-check-s390x: OK (95.02=setup[26.23]+cmd[68.79] seconds)
  unused-code: OK (266.71=setup[202.33]+cmd[64.37] seconds)
  utilities-unittests: OK (101.31=setup[26.69]+cmd[74.53,0.08] seconds)
  congratulations :) (542.27 seconds)