feat(python): default to new ruff instead of ruff_lsp (#4126)

## Description

Change default python ruff lsp from `ruff_lsp` to `ruff`. It is now
marked as stable. I have been using it for a few days without any
problems. I use python for relatively small to medium projects. Maybe
someone who is using python more rigorously has better feedback.

References:

https://github.com/astral-sh/ruff-lsp (see note)
https://github.com/astral-sh/ruff/releases/tag/0.5.3
https://docs.astral.sh/ruff/editors/setup/#neovim

Also the issue in https://github.com/LazyVim/LazyVim/pull/3057 has been
resolved. I tested it and I only get 1 `ruff server` process per nvim
instance. The processes close correctly when nvim is closed.

## Checklist

- [x] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.

lua/lazyvim/plugins/lsp/init.lua

@@ -196,6 +196,9 @@ return {
         local server_opts = vim.tbl_deep_extend("force", {
           capabilities = vim.deepcopy(capabilities),
         }, servers[server] or {})
+        if server_opts.enabled == false then
+          return
+        end
 
         if opts.setup[server] then
           if opts.setup[server](server, server_opts) then