fix restic backup progress error

[qiuming-best]

Signed-off-by: Ming mqiu@vmware.com

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Does your change fix a particular issue?

Fixes #(issue)
fix restic backup progress error
#5503

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• 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.

[codecov-commenter]

Codecov Report

Merging #5534 (32637da) into main (e6ba774) will increase coverage by 0.08%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #5534      +/-   ##
==========================================
+ Coverage   40.74%   40.82%   +0.08%     
==========================================
  Files         238      238              
  Lines       20561    20578      +17     
==========================================
+ Hits         8377     8401      +24     
+ Misses      11568    11561       -7     
  Partials      616      616              

Impacted Files	Coverage Δ
pkg/restic/exec_commands.go	15.21% <0.00%> (ø)
pkg/repository/provider/unified_repo.go	58.20% <0.00%> (+0.37%)	⬆️
pkg/repository/config/config.go	100.00% <0.00%> (+4.08%)	⬆️
pkg/repository/config/azure.go	15.32% <0.00%> (+9.33%)	⬆️

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