Add support for block volumes

[dzaninovic]

Thank you for contributing to Velero!

Please add a summary of your change

Cherry-pick #6680 to 1.12 release.

Does your change fix a particular issue?

Fixes #6548

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• Updated the corresponding documentation in site/content/docs/main.

Testing

I ran automated tests and retested backup and restore of block and filesystem PVC with md5 verification.

[codecov]

Codecov Report

Merging #6897 (feccdec) into release-1.12 (554403d) will decrease coverage by 0.10%.
The diff coverage is 55.00%.

@@               Coverage Diff                @@
##           release-1.12    #6897      +/-   ##
================================================
- Coverage         60.47%   60.37%   -0.10%     
================================================
  Files               244      246       +2     
  Lines             26074    26232     +158     
================================================
+ Hits              15768    15838      +70     
- Misses             9199     9279      +80     
- Partials           1107     1115       +8     

Files	Coverage Δ
pkg/datapath/file_system.go	32.14% <100.00%> (-2.03%)	⬇️
pkg/exposer/generic_restore.go	71.31% <100.00%> (-0.12%)	⬇️
pkg/install/daemonset.go	100.00% <100.00%> (ø)
pkg/uploader/provider/kopia.go	83.44% <100.00%> (-0.64%)	⬇️
pkg/exposer/csi_snapshot.go	79.92% <75.00%> (-0.64%)	⬇️
pkg/controller/data_upload_controller.go	68.44% <85.71%> (+0.08%)	⬆️
pkg/install/resources.go	77.20% <0.00%> (-0.94%)	⬇️
pkg/install/deployment.go	91.18% <0.00%> (-1.64%)	⬇️
pkg/exposer/host_path.go	80.00% <45.45%> (+3.80%)	⬆️
pkg/uploader/kopia/snapshot.go	83.33% <81.81%> (+0.88%)	⬆️
... and 5 more

[sseago]

@dzaninovic Oh, I guess you need to update the changelog filename to reflect the cherry-pick PR number.

[dzaninovic]

@dzaninovic Oh, I guess you need to update the changelog filename to reflect the cherry-pick PR number.

@sseago, I was not sure if that needs to be updated since it is a cherry-pick.
I updated it now.

[sseago]

@dzaninovic one more thing -- looks like this PR needs to be rebased after recent merges to release-1.12

[dzaninovic]

@dzaninovic one more thing -- looks like this PR needs to be rebased after recent merges to release-1.12

@sseago, I rebased it again.

[kaovilai]

need dco

[kaovilai]

im assuming it wants signoff as last line in commit message.

[kaovilai]

Just git commit --signoff --amend --no-edit

[dzaninovic]

I fixed the DCO issue by moving it to the last line.

[shubham-pampattiwar]

/lgtm