Enable linter revive and resolve found errors: part2

[blackpiglet]

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Fixes #(issue)

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• 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.
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[codecov-commenter]

Codecov Report

Merging #6177 (bb31de3) into main (a0b0b7c) will decrease coverage by 0.03%.
The diff coverage is 54.34%.

@@            Coverage Diff             @@
##             main    #6177      +/-   ##
==========================================
- Coverage   41.29%   41.27%   -0.03%     
==========================================
  Files         251      251              
  Lines       23386    23377       -9     
==========================================
- Hits         9658     9648      -10     
- Misses      12970    12974       +4     
+ Partials      758      755       -3     

Impacted Files	Coverage Δ
pkg/plugin/clientmgmt/process/registry.go	26.27% <ø> (ø)
pkg/repository/config/gcp.go	58.33% <0.00%> (+4.48%)	⬆️
pkg/repository/udmrepo/kopialib/lib_repo.go	30.31% <0.00%> (+0.17%)	⬆️
pkg/repository/udmrepo/kopialib/repo_init.go	86.41% <ø> (ø)
pkg/uploader/kopia/shim.go	0.00% <0.00%> (ø)
pkg/uploader/provider/provider.go	0.00% <0.00%> (ø)
pkg/repository/backup_repo_op.go	63.63% <50.00%> (ø)
pkg/restore/restore.go	64.74% <72.72%> (ø)
...kupitemaction/v1/restartable_backup_item_action.go	82.50% <100.00%> (ø)
...kupitemaction/v2/restartable_backup_item_action.go	61.64% <100.00%> (ø)
... and 9 more

... and 1 file with indirect coverage changes

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[kaovilai]

lgtm!