I’m just telling you how to disable the helm chart installing things. if you have a PVC mounted for jenkins home, you don’t need to reinstall each time.
GitHub - jenkinsci/plugin-installation-manager-tool: Plugin Manager CLI tool for Jenkins will have all the details, but you don’t need to specify versions, you can just specify plugins and it’ll grab the latest version each build.
Or, you could have explicit versions, make sure your exact image is rebuildable each time, and use renovate to trigger updates to your plugins.txt files
There’s really no right way