Adds namespace labels to Cluster resources when creating and deleting

[danielfbm]

What this PR does / why we need it:

When running in parallel delete will remove all cluster resources. This PR will add a label using the same namespace and make sure that one run will not affect another

Which issue(s) this PR fixes
None reported

Special notes for your reviewer:
Will squash commits if PR is accepted.

Release note:

Adds namespace labels to Cluster resource when creating and deleting data allowing parallel runs

[codecov-io]

Codecov Report

Merging #1060 into master will decrease coverage by 1.94%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #1060      +/-   ##
==========================================
- Coverage    49.9%   47.95%   -1.95%     
==========================================
  Files          78       78              
  Lines        5613     5632      +19     
==========================================
- Hits         2801     2701     -100     
- Misses       2647     2771     +124     
+ Partials      165      160       -5

Impacted Files	Coverage Δ
pkg/client/delete.go	4.34% <0%> (-0.24%)	⬇️
pkg/image/v1.17.go	0% <0%> (-100%)	⬇️
pkg/image/manifest.go	39.28% <0%> (-29.61%)	⬇️
cmd/sonobuoy/app/images.go	25.13% <0%> (-6.89%)	⬇️
pkg/plugin/aggregation/aggregator.go	72.67% <0%> (-3.11%)	⬇️
cmd/sonobuoy/app/gen.go	74.1% <0%> (-0.37%)	⬇️
cmd/sonobuoy/app/args.go	90.28% <0%> (-0.27%)	⬇️
pkg/client/interfaces.go	80.95% <0%> (ø)	⬆️
pkg/config/config.go	61.29% <0%> (ø)	⬆️

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[johnSchnake]

Thanks for the contribution; I'm certain this will help a bunch of folks. I know that it is common to run multiple copies in different namespaces. 👍