update helm builder tests for prov file verification

Signed-off-by: Sanskar Jaiswal <jaiswalsanskar078@gmail.com>

Author: aryan9600

internal/helm/testdata/charts/helmchart-0.1.0.tgz

@@ -0,0 +1,26 @@
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+
+apiVersion: v2
+appVersion: 1.16.0
+description: A Helm chart for Kubernetes
+name: helmchart
+type: application
+version: 0.1.0
+
+...
+files:
+  helmchart-0.1.0.tgz: sha256:c6c5a41ff83f415e18d2ed8ab3a386021e3f1742ea3d1bc0ba759a09aaeb8f2a
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