refactor!: deprecate util.root_pattern

This will be breaking primarily for language servers that rely on
code dependencies that is archived but still needs to be read. More
context: neovim#1687.

Work on neovim#2079.

lua/lspconfig/configs/crystalline.lua

@@ -1,12 +1,9 @@
-local util = require 'lspconfig.util'
-
 return {
   default_config = {
     cmd = { 'crystalline' },
     filetypes = { 'crystal' },
     root_dir = function(fname)
-      return util.root_pattern('shard.yml')(fname)
-        or vim.fs.dirname(vim.fs.find('.git', { path = fname, upward = true })[1])
+      return vim.fs.dirname(vim.fs.find({ '.git', 'shard.yml' }, { path = fname, upward = true })[1])
     end,
     single_file_support = true,
   },

lua/lspconfig/configs/sourcery.lua

@@ -1,5 +1,3 @@
-local util = require 'lspconfig.util'
-
 local root_files = {
   'pyproject.toml',
   'setup.py',
@@ -38,8 +36,7 @@ return {
       token = nil,
     },
     root_dir = function(fname)
-      return util.root_pattern(unpack(root_files))(fname)
-        or vim.fs.dirname(vim.fs.find('.git', { path = fname, upward = true })[1])
+      return vim.fs.dirname(vim.fs.find({ '.git', unpack(root_files) }, { path = fname, upward = true })[1])
     end,
     single_file_support = true,
   },