Call on_attach from lsp_config in rust

lua/plugins/rustaceanvim.lua

@@ -8,6 +8,7 @@ return {
           local options = { noremap = true, silent = false, buffer = bufnr }
           vim.keymap.set('n', '<space>y', function() vim.cmd.RustLsp { 'hover', 'actions' } end,
             vim.tbl_extend('error', options, { desc = 'Hover' }))
+          require('plugins.lspconfig').on_attach(client, bufnr)
         end
       }
     }