fix(helm): support completion for snap installs (#10723)

plugins/helm/helm.plugin.zsh

@@ -14,9 +14,9 @@ command mkdir -p "$ZSH_CACHE_DIR/completions"
 # If the completion file does not exist, generate it and then source it
 # Otherwise, source it and regenerate in the background
 if [[ ! -f "$ZSH_CACHE_DIR/completions/_helm" ]]; then
-  helm completion zsh >| "$ZSH_CACHE_DIR/completions/_helm"
+  helm completion zsh | tee "$ZSH_CACHE_DIR/completions/_helm" >/dev/null
   source "$ZSH_CACHE_DIR/completions/_helm"
 else
   source "$ZSH_CACHE_DIR/completions/_helm"
-  helm completion zsh >| "$ZSH_CACHE_DIR/completions/_helm" &|
+  helm completion zsh | tee "$ZSH_CACHE_DIR/completions/_helm" >/dev/null &|
 fi