add helm repo auth support

[silenceper]

What type of PR is this?

add helm repo auth support

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #186

Special notes for your reviewer:

[codecov-commenter]

Codecov Report

Merging #193 (b17925f) into main (0de5729) will increase coverage by 0.02%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##            main    #193      +/-   ##
========================================
+ Coverage   7.96%   7.98%   +0.02%     
========================================
  Files         29      29              
  Lines       3806    3834      +28     
========================================
+ Hits         303     306       +3     
- Misses      3479    3505      +26     
+ Partials      24      23       -1     

Impacted Files	Coverage Δ
...ithub.com/clusternet/clusternet/pkg/utils/chart.go	0.00% <0.00%> (ø)
...ub.com/clusternet/clusternet/pkg/utils/deployer.go	0.00% <0.00%> (ø)
...ernet/clusternet/pkg/hub/apiserver/shadow/utils.go	100.00% <0.00%> (+10.71%)	⬆️

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[dixudx]

Thanks for working on this useful feature. Good job! Only a few knots here.

[dixudx]

Good job! 👍👍👍 Thanks @silenceper