Update helm repo when chart is not found

[ffjlabo]

What this PR does:

as title

This is the TODO in the prev PR #6162

Why we need it:

Which issue(s) this PR fixes:

Part of #5764
Follow #6162

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[Warashi]

👍🏻

[codecov]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 28.55%. Comparing base (1f22063) to head (299c896).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/app/pipedv1/plugin/kubernetes/provider/helm.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6169      +/-   ##
==========================================
- Coverage   28.57%   28.55%   -0.02%     
==========================================
  Files         535      535              
  Lines       57285    57289       +4     
==========================================
- Hits        16367    16361       -6     
- Misses      39647    39657      +10     
  Partials     1271     1271              

Flag	Coverage Δ
.	23.12% <ø> (-0.02%)	⬇️
.-pkg-app-pipedv1-plugin-analysis	62.85% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	60.84% <0.00%> (-0.07%)	⬇️
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.48% <ø> (ø)
.-pkg-app-pipedv1-plugin-scriptrun	54.83% <ø> (ø)
.-pkg-app-pipedv1-plugin-terraform	38.31% <ø> (ø)
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-waitapproval	68.62% <ø> (ø)
.-pkg-plugin-sdk	50.32% <ø> (ø)
.-tool-actions-gh-release	19.23% <ø> (ø)
.-tool-actions-plan-preview	25.30% <ø> (ø)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (ø)

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[khanhtc1202]

👌