Function setup_metasrv_plugins_post_build 

pub async fn setup_metasrv_plugins_post_build(
    plugins: &mut Plugins,
    plugin_options: &[PluginOptions],
    builder: &MetasrvBuilder,
) -> Result<()>

Sets up metasrv plugins after the MetasrvBuilder is constructed but before MetasrvBuilder::build().

Plugins can read context from the builder (e.g., kv_backend, options) and insert additional plugins. After this call, MetasrvBuilder::plugins() should be called to set plugins on the builder.