fix: parse registry credentials when auth is blank

[danielpacak]

Resolves: #855
Resolves: #857

Signed-off-by: Daniel Pacak pacak.daniel@gmail.com

[codecov]

Codecov Report

Merging #859 (64955e1) into main (85723da) will increase coverage by 0.48%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #859      +/-   ##
==========================================
+ Coverage   65.52%   66.00%   +0.48%     
==========================================
  Files          58       58              
  Lines        6454     6460       +6     
==========================================
+ Hits         4229     4264      +35     
+ Misses       1798     1774      -24     
+ Partials      427      422       -5     

Impacted Files	Coverage Δ
pkg/docker/config.go	73.61% <100.00%> (+2.39%)	⬆️
pkg/operator/controller/vulnerabilityreport.go	65.73% <0.00%> (+1.04%)	⬆️
pkg/operator/controller/configauditreport.go	66.17% <0.00%> (+3.23%)	⬆️
pkg/operator/controller/ciskubebenchreport.go	63.31% <0.00%> (+6.55%)	⬆️

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