[release-0.8] restic restore run cmd separately to capture error

[openshift-cherrypick-robot]

This is an automated cherry-pick of #1005

/assign tesshuflower

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Merging #1009 (9b8c475) into release-0.8 (7d76bd1) will decrease coverage by 0.2%.
The diff coverage is n/a.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-0.8   #1009     +/-   ##
=============================================
- Coverage         67.0%   66.9%   -0.2%     
=============================================
  Files               55      55             
  Lines             7080    7080             
=============================================
- Hits              4748    4739      -9     
- Misses            2055    2061      +6     
- Partials           277     280      +3     

see 1 file with indirect coverage changes

[tesshuflower]

/approve
/lgtm

[openshift-ci]

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