feat(helm): use helm upgrade for install [r8s-258] (#568)

pkg/libhelm/sdk/testutils/values.go

@@ -0,0 +1,26 @@
+package testutils
+
+import (
+	"os"
+)
+
+// CreateValuesFile creates a temporary file with the given content for testing
+func CreateValuesFile(values string) (string, error) {
+	file, err := os.CreateTemp("", "helm-values")
+	if err != nil {
+		return "", err
+	}
+
+	_, err = file.WriteString(values)
+	if err != nil {
+		file.Close()
+		return "", err
+	}
+
+	err = file.Close()
+	if err != nil {
+		return "", err
+	}
+
+	return file.Name(), nil
+}