move formula_specialties to compat

Closes Homebrew/homebrew#37365.

Signed-off-by: Xu Cheng <xucheng@me.com>

Library/Homebrew/compat.rb

 require 'compat/fails_with_llvm'
 require 'compat/formula'
+require 'compat/formula_specialties'
 require 'compat/hardware'
 require 'compat/macos'
 require 'compat/md5'

Library/Homebrew/formula.rb

@@ -1009,4 +1009,3 @@ class Formula
   end
 end
 
-require 'formula_specialties'

Library/Homebrew/test/test_formula_install.rb

 require 'testing_env'
 require 'formula'
+require 'compat/formula_specialties'
 require 'testball'
 require 'keg'