feat: add retry to helm installation and knative manifests apply

[pmalek]

What this PR does / why we need it

This PR adds the retry package that can be used to trigger commands that should be retried in case of a failure.

Which issue does this solve

Closes #476 and #466

[codecov-commenter]

Codecov Report

Base: 53.33% // Head: 51.65% // Decreases project coverage by -1.69% ⚠️

Coverage data is based on head (e4d4dd6) compared to base (ad4be26).
Patch coverage: 70.96% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #523      +/-   ##
==========================================
- Coverage   53.33%   51.65%   -1.69%     
==========================================
  Files          49       50       +1     
  Lines        3896     3903       +7     
==========================================
- Hits         2078     2016      -62     
- Misses       1555     1641      +86     
+ Partials      263      246      -17     

Flag	Coverage Δ
integration-test	56.32% <70.96%> (-1.93%)	⬇️
unit-test	3.27% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/clusters/addons/knative/knative.go	0.00% <0.00%> (-59.63%)	⬇️
pkg/clusters/cleanup.go	77.96% <ø> (ø)
pkg/clusters/addons/kong/addon.go	60.88% <71.42%> (+0.20%)	⬆️
internal/retry/command.go	100.00% <100.00%> (ø)
pkg/clusters/utils.go	50.20% <0.00%> (+1.24%)	⬆️
pkg/clusters/types/kind/cluster.go	75.00% <0.00%> (+1.47%)	⬆️

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