chore: define common aliases for k8s packages

[mmorel-35]

Thank you for contributing to Velero!

Please add a summary of your change

define common aliases for k8s packages

Does your change fix a particular issue?

Fixes #(issue)

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.
• Updated the corresponding documentation in site/content/docs/main.

[mmorel-35]

/kind changelog-not-required

[codecov]

Codecov Report

Attention: Patch coverage is 83.97626% with 54 lines in your changes missing coverage. Please review.

Project coverage is 59.48%. Comparing base (e64806a) to head (294aeab).

Files with missing lines	Patch %	Lines
pkg/cmd/cli/nodeagent/server.go	14.28%	6 Missing ⚠️
pkg/datapath/micro_service_watcher.go	53.84%	6 Missing ⚠️
pkg/exposer/csi_snapshot.go	85.71%	6 Missing ⚠️
pkg/exposer/generic_restore.go	80.00%	6 Missing ⚠️
pkg/restore/restore.go	79.16%	4 Missing and 1 partial ⚠️
pkg/controller/data_upload_controller.go	70.00%	2 Missing and 1 partial ⚠️
pkg/controller/restore_finalizer_controller.go	62.50%	0 Missing and 3 partials ⚠️
internal/resourcepolicies/resource_policies.go	50.00%	2 Missing ⚠️
pkg/cmd/cli/datamover/backup.go	0.00%	2 Missing ⚠️
pkg/cmd/cli/datamover/restore.go	0.00%	2 Missing ⚠️
... and 11 more

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8672   +/-   ##
=======================================
  Coverage   59.48%   59.48%           
=======================================
  Files         371      371           
  Lines       40191    40191           
=======================================
  Hits        23909    23909           
  Misses      14789    14789           
  Partials     1493     1493           

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