[llvm] [TableGen][Docs] Accept "code" as a Type (PR #124902)

[Jay Foad via llvm-commits]

jayfoad wrote:

This patch undoes some of the documentation changes made in https://reviews.llvm.org/D92269 "[TableGen] Eliminate the 'code' type". I don't understand the reason for those changes.

@Paul-C-Anagnostopoulos 

https://github.com/llvm/llvm-project/pull/124902