[1.12] Issue 6647: add default-snapshot-move-data parameter to Velero install

[Lyndon-Li]

Fix issue #6647, add the --default-snapshot-move-data parameter to Velero install, so that users don't need to specify --snapshot-move-data per backup when they want to move snapshot data for all backups

[codecov]

Codecov Report

Merging #6940 (8bf98e8) into release-1.12 (e53cfdf) will decrease coverage by 0.03%.
The diff coverage is 29.41%.

@@               Coverage Diff                @@
##           release-1.12    #6940      +/-   ##
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- Coverage         60.40%   60.38%   -0.03%     
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  Files               246      246              
  Lines             26245    26262      +17     
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+ Hits              15854    15859       +5     
- Misses             9277     9287      +10     
- Partials           1114     1116       +2     

Files	Coverage Δ
pkg/cmd/server/server.go	21.97% <66.66%> (+0.17%)	⬆️
pkg/controller/backup_controller.go	61.33% <75.00%> (+0.08%)	⬆️
pkg/install/resources.go	76.28% <0.00%> (-0.92%)	⬇️
pkg/install/deployment.go	88.46% <0.00%> (-2.73%)	⬇️