chore(ci): adjust golangci-lint config, fix reported

[programmer04]

What this PR does / why we need it:

Remove redundant configuration for skip-dirs from .golangci.yaml. It's not needed since auto-generated Go code is marked with comments and omitted by golangci-lint. Furthermore, this redundant config leads to omitting files that should be checked.

Special notes for your reviewer:

Adding a dot in pkg/apis/configuration/v1/conditions.go is questionable, but let's do it to satisfy the linter, it doesn't make "serious harm".

[codecov]

Codecov Report

Patch coverage: 55.5% and no project coverage change.

Comparison is base (f6de833) 67.5% compared to head (60f2639) 67.5%.
Report is 8 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #4451   +/-   ##
=====================================
  Coverage   67.5%   67.5%           
=====================================
  Files        160     160           
  Lines      18803   18804    +1     
=====================================
+ Hits       12704   12705    +1     
  Misses      5337    5337           
  Partials     762     762           

Files Changed	Coverage Δ
internal/dataplane/configfetcher/config_fetcher.go	78.5% <ø> (ø)
internal/dataplane/kongstate/consumer.go	100.0% <ø> (ø)
internal/dataplane/parser/translators/ingress.go	93.8% <ø> (ø)
...al/dataplane/sendconfig/inmemory_error_handling.go	58.9% <0.0%> (-0.9%)	⬇️
internal/manager/scheme/scheme.go	22.5% <0.0%> (ø)
internal/store/fake_store.go	39.6% <0.0%> (ø)
internal/admission/handler.go	35.2% <50.0%> (ø)
internal/dataplane/kongstate/route.go	90.9% <100.0%> (ø)
internal/dataplane/kongstate/service.go	46.7% <100.0%> (ø)
internal/dataplane/kongstate/upstream.go	63.5% <100.0%> (ø)
... and 6 more

... and 2 files with indirect coverage changes

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