Add setting TTL in backup E2E test

[danfengliu]

Signed-off-by: danfengl danfengl@vmware.com

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Does your change fix a particular issue?

Fixes #4264

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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.
• Updated the corresponding documentation in site/content/docs/main.

[codecov-commenter]

Codecov Report

Merging #4896 (92d1a37) into main (419f9dd) will increase coverage by 0.59%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4896      +/-   ##
==========================================
+ Coverage   41.13%   41.73%   +0.59%     
==========================================
  Files         204      204              
  Lines       18095    18164      +69     
==========================================
+ Hits         7443     7580     +137     
+ Misses      10102    10012      -90     
- Partials      550      572      +22     

Impacted Files	Coverage Δ
pkg/controller/gc_controller.go	76.31% <0.00%> (-1.87%)	⬇️
pkg/restore/restore.go	65.35% <0.00%> (-1.35%)	⬇️
pkg/install/resources.go	52.55% <0.00%> (-0.25%)	⬇️
pkg/builder/restore_builder.go	0.00% <0.00%> (ø)
pkg/cmd/util/output/restore_describer.go	0.00% <0.00%> (ø)
pkg/cmd/server/server.go	7.02% <0.00%> (+0.12%)	⬆️
pkg/install/deployment.go	86.91% <0.00%> (+0.44%)	⬆️
pkg/controller/restic_repository_controller.go	52.25% <0.00%> (+52.25%)	⬆️

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