Simplify addon testing setup

test/ruby_lsp_addon_test.rb

@@ -1,21 +1,4 @@
-# All of these requires were needed because `ruby_lsp/internal` mutates rubocop
-# in a way that breaks test/standard/cli_test.rb
-require "sorbet-runtime"
-require "language_server-protocol"
-require "ruby_lsp/base_server"
-require "ruby_lsp/server"
-require "ruby_lsp/requests"
-require "ruby_lsp/addon"
-require "ruby_lsp/utils"
-require "ruby_lsp/store"
-require "ruby_lsp/document"
-require "ruby_lsp/erb_document"
-require "ruby_lsp/type_inferrer"
-require "ruby_lsp/global_state"
-require "core_ext/uri"
-require "ruby_indexer/ruby_indexer"
-require "ruby_lsp/ruby_document"
-require "prism"
+require "ruby_lsp/internal"
 require "ruby_lsp/standard/addon"
 
 require_relative "test_helper"