[oadp-1.1] Remove creation/usage of velero-privileged SCC (OADP-290)

[openshift-cherrypick-robot]

This is an automated cherry-pick of #860

/assign hhpatel14

[codecov-commenter]

Codecov Report

Base: 32.65% // Head: 33.54% // Increases project coverage by +0.89% 🎉

Coverage data is based on head (110eeb4) compared to base (e8de6eb).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff              @@
##           oadp-1.1     #877      +/-   ##
============================================
+ Coverage     32.65%   33.54%   +0.89%     
============================================
  Files            17       17              
  Lines          3237     3151      -86     
============================================
  Hits           1057     1057              
+ Misses         2088     2002      -86     
  Partials         92       92              

Impacted Files	Coverage Δ
controllers/dpa_controller.go	0.00% <ø> (ø)
controllers/velero.go	56.98% <ø> (+7.61%)	⬆️

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[hhpatel14]

/test 4.10-operator-e2e-azure
/test 4.9-operator-e2e-azure

[openshift-ci]

@openshift-cherrypick-robot: all tests passed!

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