fix multierror variable issue

[patilpankaj212]

Fixed - The multierror variable in load-dir.go files of helm, kustomize and k8s iac providers should not be a package level variable.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #818 (d3b8a9e) into master (a4d7af9) will not change coverage.
The diff coverage is 60.00%.

@@           Coverage Diff           @@
##           master     #818   +/-   ##
=======================================
  Coverage   74.85%   74.85%           
=======================================
  Files         111      111           
  Lines        3345     3345           
=======================================
  Hits         2504     2504           
  Misses        656      656           
  Partials      185      185           

Impacted Files	Coverage Δ
pkg/iac-providers/kubernetes/v1/types.go	100.00% <ø> (ø)
pkg/iac-providers/kustomize/v3/types.go	100.00% <ø> (ø)
pkg/iac-providers/helm/v3/load-dir.go	82.89% <50.00%> (ø)
pkg/iac-providers/kubernetes/v1/load-dir.go	67.74% <66.66%> (ø)
pkg/iac-providers/kustomize/v3/load-dir.go	71.69% <66.66%> (ø)