[llvm][CMake][TableGen] Add all TableGen files to tablegen_compile_commands.yml (#71686)

This file is a list of files and their required include dirs, used by
the TableGen LSP server
(https://mlir.llvm.org/docs/Tools/MLIRLSP/#tablegen-lsp-language-server--tblgen-lsp-server).

Initialy this only included MLIR TableGen files, so I've expanded that
by moving it into llvm so all projects that use the llvm `tablegen`
function will be added to the file.

You could already do some things in llvm TableGen files without this,
but were limited with files that don't include their dependencies using
`include`, only with command line arguments.

Once those are in the yml file, the language server sees all that and go
to definition etc. all works.